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': 'Calcium content of bone is increased in - \nSelect and explain. \nA. Prolonged immobilisation, B. Glucocorticoid administration, C. Hyperparathyroidism, D. Estrogen supplementation in post menopausal women', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]