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: Pathology
[{'content': 'Most common cause of primary hyperparathyroidism ? \nSelect and explain. \nA. Hyperplasia, B. Solitary Adenoma, C. Carcinoma, D. Multiple adenomas', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., AdenomaHyperparathyroidismHyperparathyroidism is caused by elevated parathyroid hormone.Primary hyperparathyroidism : an autonomous overproduction of parathyroid hormone (PTH), usually resulting from an adenoma or hyperplasia of parathyroid tissue.", 'role': 'assistant'}]