The formation of a polar body occurs during the formation of which of the following?

In humans,sperms move after ejaculation at a rate of nearly

Spermatogonia undergo a series of cell divisions to produce sperms. Select the correct statements from the following:
$A$. Spermatogonia always undergo meiotic cell division.
$B$. Primary spermatocytes divide mitotically to produce secondary spermatocytes.
$C$. Secondary spermatocytes, through their second meiotic division, produce spermatids.
$D$. Spermatids produce spermatozoa through mitosis.
$E$. Spermatids transform into spermatozoa by spermiogenesis.
Choose the correct answer from the options given below:

Ovulation in mammals is caused by

$A$ temporary endocrine gland formed after ovulation in the ovary is:

After ovulation,what does the Graafian follicle transform into?