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: Pediatrics
[{'content': 'Screening of neonatal thyroid disease is done by \nSelect and explain. \nA. T4, B. T3, C. TSH, D. TPO antibodies', 'role': 'user'}, {'content': "Answer: C \nExplanation: Since the neonates are asymptomatic at bih all newborns are screened for neonatal hypothyroidism. TSH is estimated either in cord blood at the time of bih (preferred) or blood obtained from heel prick after 2 days of bih.(Refer: Nelson's Textbook of Pediatrics, SAE, 1st edition, pg no. 2669 - 2773)", 'role': 'assistant'}]