This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Social & Preventive Medicine
Difference b w the incidence in exposed and non exposed group is best given by 
Select and explain. 
A. relative risk, B. attributable risk, C. population attributable risk, D. odd's ratio
C: population attributable risk
Answer: C: population attributable risk 
Explanation: attributable risk : Attributable Risk(AR) (sometimes called Attributable Propoion or Attributable Fraction) is a measure of the prevalence of a condition or disease. Given a group of people exposed to a risk, it&;s the fraction who develop a disease or condition. ref : park 21st ed