This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Gynaecology & Obstetrics
[{'content': 'True about centchroman are all, EXCEPT : \nSelect and explain. \nA. It is synthetic non -- steroidal contraceptive, B. The only side effect is oligomenorrhoea, C. Safe in liver disease, D. Can be used as post -- coital pill', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Safe in liver disease', 'role': 'assistant'}]