The correct option is A a-3, b-4, c-1, d-2
FSH (Follicular Stimulating Hormone) : FSH stimulates the growth of ovarian follicles in the ovary before the release of an egg. It helps in the maturation of primary follicles into Graafian follicle.
LH (Luteinising Hormone) : LH is a gonadotropin which is released by the anterior pituitary gland and helps in the process of ovulation in females. It also helps in the development of the corpus luteum.
Progesterone : Progesterone helps in the maintenance of the endometrial lining for the purpose of implantation.
Estrogen : Estrogen is a steroid hormone which helps in the development and regulation of the female reproductive system and secondary sexual characteristics.
Therefore, option a) a-3, b-4, c-1, d-2 is the correct option.