This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Social & Preventive Medicine
[{'content': 'TATA memorial hospital conducted a cohort study on 7000 subjects who were smokers over a ten-year period& found 70 subjects developed lung cancer. Concurrent evaluation of general population in the catchment area of hospital, out of 7000 non-smoker subjects only 7 developed lung cancer. The RR for developing lung cancer is \nSelect and explain. \nA. 1, B. 10, C. 100, D. 0.1', 'role': 'user'}, {'content': 'Answer: B \nExplanation: TATA memorial hospital conducted a cohort study on 7000 subjects who were smokers over a tenyear period & found 70 subjects developed lung cancer,\nThus, Iexp = × 1000 = 10 per thousand\nAlso, concurrent evaluation of general population in the catchment area of hospital, out of 7000 non-smoker subjects only 7 developed lung cancer,\nThus, Inon-exp = × 1000 = 1 per 1000\nTherefore, RR = 10 per 1000/ 1 per 1000\n= 10', 'role': 'assistant'}]