This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Disorders in Menstruation, Subject name: Gynaecology & Obstetrics
[{'content': 'M/C cause of hirsutism in a young female: \nSelect and explain. \nA. Ovarian tumor, B. Adrenal tumor, C. CAH, D. PCOS', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. is d, i.e. PCOSRef: Leon Speroff 8th/ed, p545M/C cause of hirsutism in young females PCOD/PCOSM/C pathological cause of hirsutism in young females -- PCOS/PCOD.2nd M/C cause of hirsutism in young females is Idiopathic hirsutism', 'role': 'assistant'}]