Which cells come earliest in the sequence of sperm production?

Which one of the following characters favours the process of normal spermatogenesis in human male?

Graafian follicles are produced by the ovary by the process of

$A$ ruptured follicle in a mammalian ovary,after the release of the ovum,forms:

What is oogenesis? Give a brief account of oogenesis.

Given below are two statements:
Statement $I$:
The release of sperms into the seminiferous tubules is called spermiation.
Statement $II$:
Spermiogenesis is the process of formation of sperms from spermatogonia.
In the light of the above statements,choose the most appropriate answer from the options given below: