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': 'Which of the following is/are 1st line antitubercular drugs children- \nSelect and explain. \nA. Isoniazid, B. Rifampicin, C. Pyrazinamide, D. Ethambutol', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Park&;s Textbook of Preventive and Social Medicine 23rd edition Page no:195 Tb preventive therapy: the dose of a INH chemoprophylaxis is 10 mg/kg administered daily for 6 months', 'role': 'assistant'}]