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: Social & Preventive Medicine
[{'content': 'Centchroman is not used in \nSelect and explain. \nA. To prevent pregnancy, B. to prevent dysfunctional uterine bleeding, C. Poly cystic ovarian syndrome, D. None of the above', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Contraindication of centchroman "are"\n\nPCOS.\nCervical hyperplasia.', 'role': 'assistant'}]