This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Non communicable diseases, Subject name: Social & Preventive Medicine
Iodine status in a population is measured using 
Select and explain. 
A. TSH, B. T3,T4, C. Thyroglobulin, D. Urinary iodine
D: Urinary iodine
Answer: D: Urinary iodine 
Explanation: Iodine sufficiency is defined as a median urinary iodine concentration of: *100 to 299 mcg/L for children and nonpregnant adults *150 to 249 mcg/L for pregnant women Iodine deficiency is defined by the following median urinary iodine concentrations: *Mild iodine deficiency - 50 to 99 mcg/L *Moderate deficiency - 20 to 49 mcg/L *Severe deficiency - <20 mcg/L Ref : Park 23rd edition Pgno : 624