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': 'All except one leads to delayed puberty \nSelect and explain. \nA. Kallman syndrome, B. McCune-Albright syndrome, C. Turners syndrome, D. Addison disease', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Mc Cune - Albright syndrome is characterised by precocious puberty.', 'role': 'assistant'}]