This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Social & Preventive Medicine
Diagnosis of TB ace to DOTS ? 
Select and explain. 
A. 1 out of 2 samples positive, B. 2 out of 3 samples positive, C. 3 out of 3 samples positive, D. None
A: 1 out of 2 samples positive
Answer: A: 1 out of 2 samples positive 
Explanation: Ans. is 'a' i.e., 1 out of 2 samples positive o Two sputum smear samples are examined. o If any of the two samples or both the samples are positive, the diagnosis of smear-positive TB is confirmed.