This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Communicable diseases, Subject name: Social & Preventive Medicine
4 drugs in AKT used because - 
Select and explain. 
A. Decrease in resistance by mutation, B. Decrease in resistance by conjugation, C. To cure disease early, D. None
A: Decrease in resistance by mutation
Answer: A: Decrease in resistance by mutation 
Explanation: <p> 4 drugs used in AKT because of decrease in resistance by mutation. Park&;s textbook of preventive and social medicine,K.Park,22nd edition,page no:173. <\p>