Answer:
The correct answer will be option-C.
Step-by-step explanation:
Corpus luteum is the structure associated with the pregnancy in females. Corpus luteum is composed of a mass of cells formed in the ovary which helps in the secretion of the progesterone and moderate level of estradiol during pregnancy.
Corpus luteum is formed after the release of the ovum from the follicles which gets degenerated if the egg is not fertilized. The progesterone helps to maintain the uterus walls as it thickens the endometrium wall and controls the uterus contraction.
Thus, Option-C is the correct answer.