Match phases of menstruation in column I with events occurring during respective phase in column II and select the correct option. Column I Column II A. Menstrual phase I. rupturing of mature Graafian follicle B. Follicular phase II. increase in level of progesterone C. Ovulatory phase III. decrease in level of estrogen and progesterone D. Luteal phase IV. development of Graafian follicle

Step-by-step solution

Menstrual phase is triggered by the withdrawal of ovarian hormones, leading to a decrease in the level of estrogen and progesterone. Thus, A matches with III. Follicular phase involves the development of primary follicles into a fully mature Graafian follicle. Thus, B matches with IV. Ovulatory phase is characterized by the LH surge which induces the rupturing of the mature Graafian follicle to release the ovum. Thus, C matches with I. Luteal phase involves the transformation of the ruptured Graafian follicle into