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 drug is not included in RNTCP regime for MDR TB ? 
Select and explain. 
A. Cycloserine, B. Ethionamide, C. Levofloxacin, D. PAS
D: PAS
Answer: D: PAS 
Explanation: Ans. is `d' i.e., PAS