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': "Increased LH:FSH ratio is found in : \nSelect and explain. \nA. Premature menopause, B. Sheehan syndrome, C. Polycystic ovary syndrome, D. Turner's syndrome", 'role': 'user'}, {'content': 'Answer: C \nExplanation: Polycystic ovary syndrome', 'role': 'assistant'}]