Which of the following has a cup-shaped thalamus?

Read the following statements.
$(i)$ Gynoecium is situated in the centre and other parts of the flower are located on the rim of the thalamus almost at the same level.
$(ii)$ Ovary is half-inferior.
$(iii)$ Examples are plum,rose and peach.
Which condition of flowers is being described by the above statements?

Which of the following is correct for the vexillary aestivation (papilionaceous)?
Standard (Vexillum) $\quad$ Wings (Alae) $\quad$ Keel (Carina)

Monadelphous androecium occurs in

$A$ flower is zygomorphic when:

On the basis of the number of stamens and their union,classify the types of stamens and provide examples.