What is the process of transformation of spermatids into spermatozoa called?

During oogenesis in females,the primary oocyte remains arrested for a long period in which stage?

If $10$ primary oocytes produce $10$ ova,how many ova will be formed after the process of oogenesis?

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:

When does the reduction division occur during the process of gametogenesis?

After ovulation, the Graafian follicle transforms into which of the following?