Which type of placentation is observed in pea plants?

In a unilocular ovary with a single ovule,the placentation is

Compound apocarpous gynoecium is found in

The biggest flower belongs to a plant which is:

The placentation in tomato and lemon is of ......... type.

Among flowers of Calotropis,tulip,Sesbania,Asparagus,Colchicum,sweet pea,Petunia,Indigofera,mustard,soybean,tobacco and groundnut,how many plants have corolla with valvate aestivation?