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': "Gynaecomastia is seen in:a) Secondary syphilisb)  Lepromatous leprosyc) HIVd) Klinefelter's syndrome \nSelect and explain. \nA. bcd, B. acd, C. ac, D. bd", 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]