What type of placentation is found in tomato and lemon?

Perigynous condition is common among

In many cultivated ornamental flowers,the number of petal whorls is higher than that in the wild type. These extra petals are generally modified:

An apocarpous flower is found in

In $Hibiscus$ $rosa-sinensis$,there is an additional floral whorl known as:

Identify the position of gynoecium in the given diagrams $A$ to $D$.