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: Pediatrics
[{'content': 'Familial hypocalciuric hypercalcemia has mild elevation of calcium and PTH levels. It occurs secondary to what mutation? \nSelect and explain. \nA. Missense mutation of mitochondrial calcium receptor, B. Missense mutation of ribosomal calcium surface protein, C. Missense mutation of Golgi complex receptor, D. Mutation of calcium - sensing receptor(CaSR)', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]