Spermiogenesis is under the control of which hormone?

Massive amount of yolk present in the vegetal region of the egg makes an egg:

The figure given below depicts a diagrammatic sectional view of the ovary. Which one set of three parts out of $I-VI$ are correctly identified?

During the first meiotic division,into what do the primary spermatocytes differentiate?

Spermiogenesis involves all of the following,$EXCEPT$

Which hormone induces ovulation from the Graafian follicle in females?