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: Medicine
[{'content': 'All are causes of Osteoporosis, except: \nSelect and explain. \nA. Thyrotoxicosis, B. Hypothyroidism, C. Chronic heparin therapy, D. Old age', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Answer is B (Hypothyroidism) Osteoporosis is seen with hypehyroidism and not with hypothyroidism. Chronic heparin therapy, thyrotoxicosis and old age are all causes of osteoporosis', 'role': 'assistant'}]