Ovary is half-inferior in the flowers of

The flowers are Zygomorphic in:
$(a)$ Mustard $(b)$ Gulmohar $(c)$ Cassia $(d)$ Datura $(e)$ Chilly
Choose the correct answer from the options given below:

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

Floral appendages arise from the ..........

In which series of Polypetalae is the thalamus of the flower cup-shaped?

Identify the correct group for perigynous flowers.