This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: DNB 2018, Subject name: Gynaecology & Obstetrics
[{'content': "A girl presents with primary amenorrhoea with normal breast, hirsutism and acne. She most probably has:- \nSelect and explain. \nA. Klinefelter syndrome, B. PCOD, C. Turner's syndrome, D. Gonadal dysgenesis", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Polycystic ovarian syndrome was originally described in 1935 by Stein & Leventhal as a syndrome manifested by amenorrhea , hirsutism and obesity associated with enlarged polycystic ovaries, It is the most common endocrine disorder in women of reproductive age.', 'role': 'assistant'}]