This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Fluid and electrolytes, Subject name: Medicine
[{'content': "Hypercalcemia caused by which one of the following is most likely to respond to treatment with coicosteroids? \nSelect and explain. \nA. Primary hyperparathyroidism, B. Milk alkali syndrome, C. Sarcoidosis, D. Paget's disease", 'role': 'user'}, {'content': 'Answer: C \nExplanation: Hypercalcemia is a highly prevalent complication of sarcoidosis. Hypercalcemia in sarcoidosis is due to the uncontrolled synthesis of 1,25-dihydroxyvitamin D3 by macrophages. 1,25-dihydroxyvitamin D3 leads to an increased absorption of calcium in the intestine and to an increased resorption of calcium in the bone Ref Davidson 23rd edition pg 364', 'role': 'assistant'}]