Which hormone level reaches peak during the luteal phase of the menstrual cycle?

The correct option is A Progesterone
Menstrual cycle
The cyclic changes that occur in the ovaries and the lining of the uterus in the female reproductive system of primates are called the menstrual cycle. Examples include humans, monkeys, etc.

Phases of the menstrual cycle
The menstrual cycle consists of three phases as follows:
1)Menstrual /bleeding phase
2)Follicular or proliferative phase
3)Luteal or secretory phase

Luteal phase
During the luteal phase, the ruptured Graffian follicle transforms into corpus luteum in the ovary. The Corpus luteum secretes a large amount of progesterone which is essential for the maintenance of the endometrium. So, progesterone reaches its peak during the luteal phase of the menstrual cycle.
This happens from the 15th to the 28th day of the menstrual cycle.

Final answer
(B) Progesterone