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': 'Most common cause of Hirsutism: \nSelect and explain. \nA. Polycystic ovary disease, B. Arrhenoblastoma, C. Cushing syndrome, D. Congenital adrenal hyperplasia', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Hirsutism is defined as excessive growth of androgen dependant sexual hair or male distribution of hair in a female.', 'role': 'assistant'}]