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': "Tertiary hyperparathyroidism is- \nSelect and explain. \nA. High PO\n4\n level with metastasis, B. Secondary hyperparathyroidism with CRF, C. Primary hyperparathyroidism with low Cam' levels, D. Secondary hyperparathyroidism with chief cell adenoma", 'role': 'user'}, {'content': 'Answer: D \nExplanation: Davidson states "In very small proportion of cases of secondary hyperparathyroidism continuous stimulation of the parathyroid may result in adenoma formation and autonomous PTH secretion. This is known as tertiary\xa0\u200bhyperparathyroidism".', 'role': 'assistant'}]