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': 'The most common cause of hypoparathyroidism is: \nSelect and explain. \nA. Idiopathic, B. Familial, C. Postradiation, D. Surgical removal', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Surgical removal of the gland is the most common\xa0cause for\xa0hypoparathyroidism.', 'role': 'assistant'}]