Concept: This question tests your knowledge of plant morphology, specifically flower characteristics like aestivation, placentation, and fruit types, as well as flower position.

Why (C) is correct:

• (A) Rose - (II) Perigynous flower: In a perigynous flower, the ovary is half-inferior, and the thalamus forms a cup-like structure enclosing the ovary, with other floral parts arising from its rim. Rose is a classic example.
• (B) Pea - (IV) Marginal placentation: Pea (Pisum sativum) belongs to the family Fabaceae, which characteristically exhibits marginal placentation, where the ovules are borne on a ridge along the ventral suture of a monocarpellary ovary.
• (C) Cotton - (I) Twisted aestivation: In twisted aestivation, one margin of the petal/sepal overlaps the next one, and the other margin is overlapped by the previous one. Cotton (Gossypium) shows this type of aestivation in its corolla.
• (D) Mango - (III) Drupe: Mango (Mangifera indica) is a drupe, which is a fleshy fruit with a stony endocarp (the 'stone' or 'pit') enclosing the seed.

Why other options are wrong:

• Option A incorrectly matches Rose with marginal placentation and Mango with twisted aestivation.
• Option B incorrectly matches Pea with drupe and Cotton with marginal placentation.
• Option D incorrectly matches Rose with twisted aestivation and Pea with perigynous flower.

Common Mistake: Students often confuse different types of aestivation (valvate, twisted, imbricate, vexillary) and placentation (marginal, axile, parietal, free central, basal).

NEET Tip: Create a table for common plant examples and their characteristic floral features (aestivation, placentation, ovary position, fruit type) to easily recall them during the exam.

Correct Answer: (C)