This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Polycystic Ovarian Syndrome, Subject name: Gynaecology & Obstetrics
[{'content': 'The most common cause of heterosexual development in a female at the expected age of pubey is- \nSelect and explain. \nA. Congenital Adrenal hyperplasia, B. Pure gonadal dysgenesis, C. Polycystic ovarian syndrome, D. Complete androgen insensitivity syndrome', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Heterosexual pubey is characterized by a pattern of development that is typical of the opposite sex occurring at the expected age of normal pubey. The most common cause of heterosexual development at the expected age of pubey is polycystic ovary syndrome The most common cause of precocious pubey is constitutional (idiopathic), but more serious causes must be ruled out and therapy geared toward optimizing adult height...', 'role': 'assistant'}]