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
As per RNTCP Cat-1, should receive-a) 4 drugs for 2 months and two drugs for 4 monthsb) 3 drugs for two months and 2 drugs for four monthsc) Includes Retreatment casesd) Rx is given dailye) Directly observed 
Select and explain. 
A. a, B. b, C. ae, D. ad
C: ae
Answer: C: ae 
Explanation: None