Free­central placentation is found in

Identify the type of flowers based on the position of calyx, corolla and androecium with respect to the ovary from the given figures ($a$) and ($b$)

Given below are two statements: One is labelled as Assertion $A$ and the other is labelled as Reason $R$:

Assertion $A$: A flower is defined as modified shoot wherein the shoot apical meristem changes to floral meristem.

Reason $R$: Internode of the shoot gets condensed to produce different floral appendages laterally at successive node instead of leaves.

In the light of the above statements, choose the correct answer from the options given below :

Perigynous flowers are found in

Choose correct pair.

Zygomorphy in Cassia flower is due to