Concept: This question tests your knowledge of the basic morphology of a flower, specifically identifying the parts of the gynoecium (female reproductive organ) and androecium (male reproductive organ).

Why (D) is correct: The filament is a part of the stamen, which is the male reproductive organ (androecium) of a flower. It is the stalk that supports the anther. The gynoecium consists of the ovary, style, and stigma.

Why other options are wrong:

• (A) Ovary: The ovary is the basal, swollen part of the pistil (gynoecium) containing ovules.
• (B) Style: The style is the elongated tube connecting the ovary to the stigma, part of the gynoecium.
• (C) Stigma: The stigma is the receptive tip of the carpel (gynoecium), which receives pollen.

Common Mistake: Students sometimes confuse the parts of the male and female reproductive structures of a flower.

NEET Tip / Mnemonic: Remember that the Gynoecium starts with 'G' for 'Girl' (female parts: Ovary, Style, Stigma). The Androecium starts with 'A' for 'Adam' (male parts: Anther, Filament).

Correct Answer: (D)