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UPSC 1999: The yield versus fertilizer input is shown in the graph. Consider the following statements based on this graph: I. Yield rate is zero at B and C. II. There is no yield with no fertilizer input. III. The yield is minimum at D. IV. The yield is neither minimum nor maximum at C. Which of the above statements are correct?
(a)I, II and IV
(b)III and IV
(c)II and III
(d)I, III and IV
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Not attemptedCorrect Answer: (b) III and IV
From the yield-fertiliser curve, the lowest point is marked D and point C is a saddle (neither min nor max). Yield is not zero at B or C and some yield exists even with zero fertiliser. Therefore only statements III and IV are correct ⇒ option (b). Official key: 136 → B. ([scribd.com](https://www.scribd.com/document/465263088/1999-upsc-prelims?utm_source=openai))
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Frequently Asked Questions
What is the correct answer to this UPSC 1999 Science & Technology question?▼
The correct answer is option (b): III and IV. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
Which year was this Quantitative Aptitude question asked in UPSC Prelims?▼
This question was asked in UPSC CSE Prelims 1999, GS Paper 1, as Question 136. It falls under Science & Technology > Quantitative Aptitude.
What is the difficulty level of this UPSC question?▼
This question is rated "moderate". It requires sound conceptual understanding of the topic.
How many UPSC Prelims questions have been asked from Quantitative Aptitude?▼
UPSC has asked 178 questions from Quantitative Aptitude (under Science & Technology) across multiple years. Visit the topic page to see the full list and year-wise trends.