A layer of cells immediately surrounding the ovum but outside the zona pellucida is called

Or
The membranous cover of the ovum at ovulation is

Match the items given in Column I with those in Column II and select the correct option given below:

Identify the parts as $\mathrm{A}, \mathrm{B}, \mathrm{C}, \mathrm{D}$ in the given diagram

Withdrawal of which of the following hormones is the immediate cause of menstruation
Or

Menstruation is triggered by an abrupt decline in the amount of
Or

Which hormone level reaches peak during luteal phase of menstrual cycle