A 24-year-old female with amenorrhoea, infertility & galactorrhoea was treated with a drug that successfully restored ovulation & menstruation. Before prescribing the drug, the woman was carefully questioned about previous history of mental health problems, which she did not have. She was advised to take the drug orally. The drug used to treat this patient is probably

A. Desmopressin

B. Cabergoline

C. Human gonadotropin

D. Leuprolide