<prompt> Best method to measure goitre prevalence rate in community is -Neonatal hypothyroidismIodine level in saltAdult hypothyroidismThyroid function test screening  <response>: Iodine monitoring Countries implementing control programmes require a network of laboratories for iodine monitoring and surveillance. These laboratories are essential for a iodine excretion determination b determination of iodine in water, soil and food as pa of epidemiological studies, and c determination of iodine in salt for quality control. Neonatal hypothyroidism is a sensitive pointer to environmental iodine deficiency and can thus be an effective indicator for monitoring the impact of a programme Ref : Park 25th edition Pgno : 693 