<prompt> In a suspected TB patient, two boxes are given for sputum sample collection. They are labeled as:-a, bA, B1, 2Y, Z  <response>: - 2 sputum samples over a period of 2 days is collected in pts, with history of cough 2weeks. - Spot sample is collected on Day-1; Morning sample is collected on Day-2. Labeling of sputum samples in RNTCP: Diagnosis as well as follow-up samples are labeled with a single LSN with a suffix a for the spot sample and b for morning sample. 