UPSC Prelims 2022: Crack Q41-50 With the Sherlocking Method

This is Part 5 of Neil sir's Sherlocking analysis of the UPSC Prelims 2022 paper, walking through questions 41 to 50 (plus a missed question 36) of Set A. The aim is not to memorise these specific answers but to show the repeatable thinking tools that let you crack unfamiliar Prelims MCQs using basic knowledge and common sense rather than rote learning. If you have ever stared at a question whose topic you have never read, this breakdown shows exactly how to still give yourself the best shot.

Key takeaways

• Two pillars carry the whole method: Prelims rewards basic knowledge plus common sense, and overview beats in-depth knowledge.
• The master dictum: a question either comes from a basic source, or it is a logical reasoning question you can solve from the hints inside the question itself.
• When a directive is vague (for example "short range"), give the benefit of the doubt to the options unless you have a strong reason to reject them.
• Watch the connotation of words: extreme terms ("any", "only", "exclusively") signal a likely-wrong statement, while soft qualifiers ("some") are hard to negate.
• A statement built on a combination of two organisations is, more often than not, incorrect.
• Never mark an answer before reading every statement, even when you have already eliminated your way to one option.
• Some questions are bouncers you are meant to get wrong. Knowing the tools matters more than chasing a perfect score.

The two pillars and the master dictum

Neil sir opens by reiterating the foundations he has built across the earlier videos. Prelims, he argues, does not demand encyclopaedic depth. It demands a solid base of basic knowledge and the willingness to apply common sense under pressure. The second pillar is that an overview of a topic is more useful than deep, narrow expertise, because the exam tests breadth.

From these flows the single most important idea in the video: either a question is lifted from a basic source, or it is a logical reasoning question. If you recognise the source, you answer from knowledge. If you do not, you stop hunting for content you never read and instead reason from the context and clues in the question. This dictum reappears in almost every question below.

Reading vague directives: question 36 and 41

In question 36 (on which communication technologies are "short range"), the directive itself is vague because no exact range is defined. The rule for such loosely worded directives is to give the benefit of the doubt to the options unless one is clearly long range. CCTV feeds nearby cameras to a local unit, RFID is known to be short range, and even on WLAN, where he was genuinely unsure, he backed the common-sense hunch rather than over-thinking it.

Question 41 is the cleaner illustration. The "Climate Action Tracker" was a name he had never heard in the exam hall. The breakthrough came when he stopped looking at the content (the four organisations listed) and looked at the context instead. The defining keyword was "tracker", and a tracker is far more likely to be a database than a wing, a committee or an agency. That single shift from content to context delivered the answer.

Spotting weak and extreme statements

Several questions turn on the wording of individual statements:

The two-organisation heuristic

In question 42 (Climate Group / EP100), the statement claiming that two organisations jointly launched an initiative is treated as suspect, because a combination of any two world organisations is usually incorrect. Neil sir admits this heuristic had failed once in an earlier session, but still backed it, expecting it to work nine times out of ten. The repeated theme of the Under2 Coalition (linked to keeping temperature rise below two degrees Celsius from pre-industrial levels) gave a second contextual anchor.

Extreme versus soft connotations

• In question 45 (Gucchi mushroom) and again in question 46 (PET), there was no "all of the above" option, which means at least one statement must be wrong. The task becomes finding the statement that is most easily manipulated — typically one carrying very specific facts (like commercial cultivation in a named region) or extreme words.
• Statements with "any" ("can store any alcoholic beverage") or absolute claims ("easily disposed without causing greenhouse emissions") carry extreme connotations and are prime candidates for elimination.
• Soft, generic statements using "some" are hard to reject and usually survive.

Throughout, he stresses the discipline of reading all statements even after eliminating to a single option, so a careless slip does not cost a sure mark.

Common sense, word association and lateral logic

Some questions need nothing more than everyday reasoning:

• Question 43 (wetlands as kidneys): the whole question pivots on what kidneys actually do — eliminate toxins. He matched that clue to the option about aquatic plants absorbing heavy metals and excess nutrients, since absorption of toxins is the closest fit.
• Question 49 (Bio-Rock technology): splitting the term into "bio" (biological) and "Rock" pointed toward restoration of damaged coral reefs, reinforced by the fact that UPSC overwhelmingly frames options around themes that sit in the syllabus.
• Questions 47 (Golden Mahseer) and 50 (Miyawaki method): both are current-affairs themes that have been in the news for three to four years, and both were answerable directly. His point: even when UPSC turns to current affairs, it usually asks easy questions on long-running themes, and the examiner often plants confusing keywords (like "garden" or "farming") in the distractors.

Probability, bouncers and honest mistakes

Two questions show the mindset for when knowledge runs out. In question 44 (air-quality data points), he eliminated a statement that packed in multiple figures — UPSC frequently distorts such data points — but the answer was different, and he took the negative without regret. These "bouncers", he says, are not worth preparing for; once the paper goes beyond standard sources, Prelims becomes a game of probability and possibility.

Question 48 (nitrogen-fixing plants) shows the probability rule in action. Stuck at a genuine 50-50 between two options, he chose to attempt rather than skip, and preferred the option with fewer constituents — a single item has better odds than a combination where every element must be correct. His PYQ analysis suggests this choice pays off around 70 percent of the time.

Who should watch this

This is for serious UPSC Prelims aspirants who panic when a question covers a topic they have never read, and who want a reasoning toolkit instead of endless rote memorisation. It is especially useful for repeaters and CSAT-anxious candidates learning to convert guesswork into structured, probability-aware decisions.

These same heuristics only become second nature through deliberate practice on real questions. Pair this breakdown with full-length mocks on our Prelims test series, and explore more such walkthroughs on the blog to build the intuition Neil sir keeps pointing back to: trust your analysis, read every statement, and give yourself the best shot.