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
Which of the following screening methods is used under RNTCP? 
Select and explain. 
A. Active, B. Passive, C. Mass, D. All of the above
B: Passive
Answer: B: Passive 
Explanation: Under RNTCP, active case finding is not pursued. Case finding is passive. Patients presenting themselves with symptoms suggesting tuberculosis are screened with two sputum smear examinations. Ref: Park 21st edition, page 381.