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': 'TB multidrug regimen is given to - \nSelect and explain. \nA. Prevent resistance, B. Broad spectrum, C. Prevent side effects, D. None', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Advantages of sho-course chemotherapy is Rapid biological conversion lower failure rates and Reduction in the frequency of emergence of drug-resistant bacilli. Ref:PARK&;S TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICINE 23rd edition , Page :188', 'role': 'assistant'}]