During the differentiation of spermatids,they are associated with which of the following?

Name the hormones involved in the regulation of spermatogenesis.

Identify the correct statement on 'inhibin'.

When is the second polar body extruded from the oocyte nucleus?

Describe the structure of a sperm.

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: