This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Methods - Combined Oestrogen-Progestogen Methods, Subject name: Gynaecology & Obstetrics
[{'content': 'Centchroman is a? \nSelect and explain. \nA. Female oral contraceptive, B. Male contraceptive, C. Tocolytic, D. Oxytocic', 'role': 'user'}, {'content': 'Answer: A \nExplanation: ANSWER: (A) Female oral contraceptiveREF: Dutta 6th ed p. 558CENTCHROMAN_(saheli)Product of CDRI LucknowNon steroidal potent anti estrogenic effectsOral OCPContains ormeloxifene', 'role': 'assistant'}]