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
Screening of neonatal thyroid disease is done by 
Select and explain. 
A. T4, B. T3, C. TSH, D. TPO antibodies
C: TSH
Answer: C: TSH 
Explanation: 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)