This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory Infections, Subject name: Social & Preventive Medicine
[{'content': 'Every TB sputum positive patient can infect up to \nSelect and explain. \nA. 1-2 persons per year, B. 5-6 persons per year, C. 10-15 persons per year, D. 100-200 persons per year', 'role': 'user'}, {'content': 'Answer: C \nExplanation: - Every TB sputum positive patient can infect up to 10-15 persons per year EPIDEMIOLOGY OF T.B: Country with highest TB burden India ARI 1.5% Infected with T.B 40% Developing T.B per day 5000/day SS +ve per year 0.8 million Deaths per year 0.37 million Index of infection 1-2% Prevalence of infection 40% Incidence / prevalence of disease Sputum smear examination', 'role': 'assistant'}]