Gynoecium centrally placed with rim of thalamus around and half-inferior ovary

• A. Hypogynous
• B. Perigynous
• C. Epigynous
• D. Polysepalous

Answer: (B)

This question tests how the position of the ovary relates to the surrounding floral parts and the presence of a hypanthium. When the receptacle or thalamus grows up to form a cup around the ovary, the ovary can be half-inferior—partially below the rim of this cup—while the gynoecium sits in the center. That cup around the ovary is the hypanthium, and this arrangement is characteristic of perigynous flowers. The central placement of the gynoecium with a surrounding rim of thalamus and a half-inferior ovary fits this pattern exactly, distinguishing it from hypogynous (superior ovary with no such cup) and epigynous (inferior ovary with floral parts fused around it). Polysepalous is about sepals, not ovary position, so it’s not relevant here.