This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Environment and health, Subject name: Social & Preventive Medicine
Most common p[arameter used to detect endemic hypothyroidism - 
Select and explain. 
A. Urinary iodine, B. Neonatal hypothyroidism, C. Rapid mass screening, D. Rate of consumption of iodine
B: Neonatal hypothyroidism
Answer: B: Neonatal hypothyroidism 
Explanation: Neonatal hypothyroidism is a sensitive indicator of environmental iodine deficiency.This in turn indicates hypothyroidism. Parks textbook of preventive and social medicine.K Park. Edition 23.Pg no: 644