Pollinia are sac-like structures:

How many microsporangia are present in a typical angiosperm anther?

Which part of the reproductive structure produces both enzymes and hormones?

What are the characteristic features of the endothecium layer in the anther of $Capsella$?

What does the tapetum provide nourishment to?

Select the correct option in which the following terms are arranged in the correct developmental sequence:
$(A)$ Pollen grain
$(B)$ Pollen mother cell
$(C)$ Microspore tetrad
$(D)$ Male gametes
$(E)$ Sporogenous tissue