In a village of 1 lakh population, among 20, 000 exposed to smoking, 200 developed cancer, and among 40,000 people unexposed, 40 developed cancer. The relative risk of smoking in the development of cancer is -: (A) 20, (B) 10, (C) 5, (D) 15
Answer is B. Ans. is 'b' i.e., 10