This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Social & Preventive Medicine
Screening under RNTCP emphasizes on 
Select and explain. 
A. Sputum microscopy, B. Chest X-ray, C. PCR, D. Sputum culture
A: Sputum microscopy
Answer: A: Sputum microscopy 
Explanation: Over-reliance on chesl X-ray was a draw back of National Tuberculosis Programme (NTP) which was over come by Revised National Tuberculosis Control Programme(RNTCP) which staed diagnosing patient by sputum microscopy &;A nation-wide network of RNTCP qaality assured designated sputum smear microscopy laboratories has been set up, providing appropriate, available, affordable and accessible diagnostic services for TB suspects and cases. Ref: Park 24th edition