In $Agave$ (Century plant),vegetative propagation occurs through which of the following?

Which of the following statements are true?
$P = \text{Papaver}$ has a multicarpellary syncarpous pistil.
$Q = \text{Endothecium}$ provides nourishment to the Microspore Mother Cell.
$R = \text{Commelina}$ has chasmogamous and cleistogamous flowers.

Select the correct option regarding gamete transfer in sexual reproduction.

The long, hair-like strands that emerge from the young cob of maize are

Indicate the stages where meiosis and mitosis occur $(1, 2$ or $3)$ in the flow chart: Megaspore mother cell $\xrightarrow{1}$ Megaspores $\xrightarrow{2}$ Embryo sac $\xrightarrow{3}$ Egg.

Which of the following indicates the correct names of $A, B, C$ and $D$ regions in the given diagram?