This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Disorders of Parathyroid Gland, Subject name: Medicine
[{'content': 'Which is true about Familial hypocalciuric hypercalcemia? \nSelect and explain. \nA. Inherited as autosomal recessive pattern, B. Cause is defect in PTH receptor, C. Clinical symptoms occur in third decade, D. Treatment is rarely necessary', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Familial hypocalciuric hypercalcemia is an autosomal dominant disorder. Hence choice A is wrong. The mutation in PTH receptor is known as Jansen disease. Hence choice B is wrong. The cause is defective calcium sensing by parathyroid gland leading to excess release of PTH and subsequent hypercalcemia. Urinary reabsorption of calcium is 99% and it presents in the first decade of life. Hence Choice C is wrong. Clinical symptoms are rarely present and hence no treatment is warranted.', 'role': 'assistant'}]