This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Epidemiology, Subject name: Social & Preventive Medicine
Community physician takes action based on - 
Select and explain. 
A. Population attributable risk, B. Relative risk, C. Attributable risk, D. Odds ratio
A: Population attributable risk
Answer: A: Population attributable risk 
Explanation: Attributable risk is defined as the difference in incidence rates of disease between an exposed group and nonexposed group. It is often expressed in percent. Attributable risk indicates to what extent the disease under study can be attributed to the exposure (refer pgno:78 park 23 rd edition)