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
[{'content': '4 drugs in AKT used because - \nSelect and explain. \nA. Decrease in resistance by mutation, B. Decrease in resistance by conjugation, C. To cure disease early, D. None', 'role': 'user'}, {'content': 'Answer: A \nExplanation: <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>', 'role': 'assistant'}]