Spermatogenesis is under the regulatory influence of

$A$ - Acrosome possesses mitochondria.
$R$ - Middle piece of sperm is filled with enzymes.

How many secondary spermatocytes are required to form $400\,million$ spermatozoa?

Identify the Graafian follicle from the given options.

Where is the stored food found in an ovum?

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: