This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Surgery
[{'content': 'Hypoparathyroidism after thyroidectomy commonly manifests in \nSelect and explain. \nA. 1 day, B. 2-5 days, C. After a week, D. After a month', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Parathyroid insufficiency after thyroidectomyThis is due to removal of the parathyroid glands or infarction through damage to the parathyroid end aery; often, both factors occur together. Vascular injury is probably far more impoant than inadveent removal. The incidence of permanent hypoparathyroidism should be less than 1 per cent and most cases present dramatically 2-5 days after operation but, veryrarely, the onset is delayed for 2-3 weeks or if a patient with marked hypocalcaemia is asymptomatic.', 'role': 'assistant'}]