<prompt> Case finidng in RNTCP is based on -Sputum cultureSputum microscopyX-ray chestMantoux test PCR  <response>: - the case finding tool in RNTCP is based on sputum examination. - sputum smear examination by direct microscopy is now considered the method of choice. Reference : Parks textbook of preventive and social medicine, 23rd edition, pg no:429 p 