In women, there are several hormones that work together for the processes of menstruation and pregnancy.
FSH (A, Follicle Stimulating Hormone) stimulates the growth of ovarian follicles in the ovary before the release of an egg from one follicle at ovulation. It also increases oestradiol production.
LH (C, Luteinizing Hormone) triggers ovulation and development of corpus luteum, a temporary endocrine structure involved in ovulation and early pregnancy.
Progesterone (D) is a steroid hormone involved in the menstrual cycle, pregnancy and embryogenesis.
These given options are not directly involved in the preparation of endometrium for pregnancy.
Therefore, options A, C & D are incorrect.
Estrogen (B) is the hormone that prepares endometrium (the mucous membrane lining the uterine inside wall) for pregnancy. It is also the primary female sex hormone responsible for the development and regulation of female reproductive and secondary sex characteristics.
Therefore, option (B) is correct.