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: Medicine
[{'content': 'Chvostek sign is seen in: March 2013 \nSelect and explain. \nA. Hypercalcemia, B. Hypothyroidism, C. Insulinoma, D. Diabetes mellitus', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. B i.e. Hypocalcemia Hypocalcemia Idiopathic hypoparathyroidism is associated with: Genetic syndrome of hypoparathyroidism, - Addison's disease and - Mucocutaneous candid iasis Pseudohypoparathyroidism: No deficiency of parathormone, but target organ (bone and kidney) are unresponsive to its action Chvostek's sign: Contraction of facial muscles, elicited by light tapping of the facial nerve ECG changes: Prolongation of QT interval", 'role': 'assistant'}]