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': "Osteoporosis is seen in : \nSelect and explain. \nA. Thyrotoxicosis, B. Cushing's disease, C. Menopause, D. All of the above", 'role': 'user'}, {'content': "Answer: D \nExplanation: Answer is D (All of the above) : Estrogen deficiency (Hypogonadal state) is known to cause osteoporosis. The most frequent estrogen deficient state is the cessation of ovarian function at the time of menopause. Thyrotoxicosis and Cushing's syndrome are known endocrine causes of osteoporosis.", 'role': 'assistant'}]