Under the influence of which hormone does spermatogenesis and oogenesis occur in vertebrates?

Which of the following statements are true for spermatogenesis but do not hold true for Oogenesis?
$(a)$ It results in the formation of haploid gametes
$(b)$ Differentiation of gamete occurs after the completion of meiosis
$(c)$ Meiosis occurs continuously in a mitotically dividing stem cell population
$(d)$ It is controlled by the Luteinising hormone $(LH)$ and Follicle-Stimulating Hormone $(FSH)$ secreted by the anterior pituitary
$(e)$ It is initiated at puberty
Choose the most appropriate answer from the options given below:

During which period does the process of oogenesis begin in females?

The growing ovarian follicles mainly secrete a hormone named?

What is the process of formation of the Graafian follicle called?

Which type of division is observed during the second maturation phase of gametogenesis?