Assertion : Megaspore mother cell undergoes meiotic division.

Reason : All four megaspres form female gametophyte.

$\text{Correct option:}$ 

$\text{Solution:}$

$\bullet$ The mass of the cell nucellus has abundant reserve food materials,dense cytoplasm and prominent nucleus . These cells act as megaspore mother cells.

$\bullet$ The megaspore mother cell undergoes meiotic division to produce four megaspores,in most of the flowering plants there is one functional megaspore and three degenerates.

$\bullet$ The functional megaspore develops into embryo sac or female gametophyte ,this process of development from one megaspore is known as monosporic development.

$\bullet$ Assertion is true but Reason is false