A) Descendingly imbricate, ten stamens, diadelphous, ovary superior
B) Sepals five, gamosepalous, imbricate aestivation, placentation marginal
C) Monocarpellary, ovary superior, style long, slightly bent at the apex
D) Corolla, five petals, polypetalous, anterior one large and outermost
Explanation
The corolla of Fabaceae family has five petals, polypetalous, Papilionaceous, descending imbricate aestivation, one posterior long standard, two lateral short wings, two anterior petals joined to each other forming keel.