Which of the following is an incorrect pair?

Given below are two statements: One is labelled as Assertion $(A)$ and the other is labelled as Reason $(R)$.
Assertion $(A)$: Both wind and water pollinated flowers are not very colourful and do not produce nectar.
Reason $(R)$: The flowers produce an enormous amount of pollen grains in wind and water pollinated flowers.
In the light of the above statements,choose the correct answer from the options given below:

How many meiotic divisions are required to produce $100$ functional megaspores in angiosperms?

Which of the following structures degenerate after fertilization in angiosperms?

Assertion $(A)$: Death is a meaningful event.
Reason $(R)$: Death limits the number of individuals of each species and returns the materials of the body,formed by life elements,back to the environment.

Which of the following plants does not produce cleistogamous flowers?