Concept: This question tests your understanding of fruit types, specifically focusing on the origin of an aggregate fruit from the flower's gynoecium.

Why (B) is correct: An aggregate fruit develops from a single flower that has a multicarpellary apocarpous gynoecium. This means the flower has multiple separate carpels (pistils), and each carpel develops into a small fruitlet. These fruitlets then aggregate together on a common receptacle to form the aggregate fruit (e.g., raspberry, strawberry, custard apple).

Why other options are wrong:

• (A) multicarpellary syncarpous gynoecium: This type of gynoecium (multiple fused carpels) forms a simple fruit (e.g., tomato, mango).
• (C) complete inflorescence: A fruit developing from an entire inflorescence is called a multiple fruit or composite fruit (e.g., pineapple, fig, jackfruit).
• (D) multicarpellary superior ovary: While an ovary can be superior, this option doesn't specify whether the carpels are fused (syncarpous) or free (apocarpous), which is the crucial distinction for aggregate fruits. A superior ovary can lead to simple or aggregate fruits depending on carpel fusion.

NEET Tip: Remember the key difference: Aggregate = single flower, multiple free carpels. Multiple = entire inflorescence.

Correct Answer: (B)