This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Medicine
[{'content': 'Secondary hyperparathyroidism are seen in all except - \nSelect and explain. \nA. Rickets, B. Osteomalacia, C. Osteoporosis, D. Renal failure', 'role': 'user'}, {'content': "Answer: C \nExplanation: Primary -Singleadenoma(90%) Multipleadenomas(4%) Nodularhyperplasia(5%) Carcinoma(1%) Secondary -Chronicrenalfailure ,Malabsorption,Osteomalacia'and rickets Teiary DAVIDSONS PRINCIPLES AND PRACTICE OF MEDICINE 22ND EDITION PAGE NO-769", 'role': 'assistant'}]