Rearrange the following sentences to form a coherent paragraph: 1. This allows a programmer to specify the structure and behavior of an object-oriented program. 2. Object-Oriented Programming (OOP) is a programming paradigm based on the concept of "objects," which can contain data and code. 3. A central tenet of OOP is the concept of a "class," which acts as a blueprint for creating objects. 4. The key advantage of this approach is that it models real-world entities, making complex systems easier to manage and debug.

Correct — A. The opener must stand alone: sentence 2 spells out Object-Oriented Programming (OOP), gives the abbreviation, and defines it.

2 → 3: 'A central tenet of OOP' adds the class, a blueprint for objects.
3 → 1: This allows a programmer to specify structure and behavior — 'this' is the class.
1 → 4: 'The key advantage of this approach' sums up and closes.

Order 2, 3, 1, 4 → option (a).

Why the others are wrong

• (b)
  4, 3, 2, 1 — This approach in sentence 4 points back to something already described, so 4 cannot open. The definition of OOP, sentence 2, cannot come after its central tenet either.
• (c)
  3, 1, 4, 2 — A central tenet of OOP uses the abbreviation before sentence 2 has introduced it, and the order ends on the definition, which belongs at the start.
• (d)
  1, 2, 3, 4 — This allows opens with 'this', which has nothing to refer to in first position. Sentence 1 needs the class concept of sentence 3 before it.

Parajumbles are solved by links between sentences, not by testing every order.

The opener introduces the topic in full: a term spelled out with its abbreviation, 'Object-Oriented Programming (OOP)', comes before any sentence that uses 'OOP' alone.

Demonstratives such as 'this' and 'this approach' point back, so a sentence starting 'This allows' needs its idea placed just before it.

A sentence naming the key advantage of an approach reads as a close.

Key facts

• A term spelled out with its abbreviation in brackets marks the sentence that introduces it.
• A sentence opening with 'This' or 'this approach' refers back and needs its antecedent before it.
• Order here: definition of OOP → its central tenet, the class → what the class allows → the key advantage.

Common traps

• Starting with sentence 1 because it is numbered first, although its 'This allows' has nothing before it to refer to.
• Opening with sentence 3 because it sounds like a topic sentence — it uses 'OOP' as if the reader already knows the term.

No directly related past PYQ was found.