This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Analytical Epidemiology, Subject name: Social & Preventive Medicine
A women is exposed to multiple sex partners has 5 times increased risk for - CaCx The attributable risk is : 
Select and explain. 
A. 20%, B. 50%, C. 80%, D. 100%
C: 80%
Answer: C: 80% 
Explanation: Ans. is 'c' i.e. 80% Attributable risk = T (Insolence of disease rate among exposed - incidence among non-exposed) /incidence rate among exposed) X 100 If the incidence of Ca CX among non-exposed = x then the incidence among exposed= 5xAR = ((5x - x)/5x) x 100 = 4/5 x 100= 80%