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
Relative risk is define as ? 
Select and explain. 
A. Incidence of disease among exposed minus incidence of disease among non-exposed, B. Incidence of disease among exposed plus incidence of disease among non-exposed, C. Incidence of disease among exposed divided by incidence of disease among non-exposed, D. None of the above
C: Incidence of disease among exposed divided by incidence of disease among non-exposed
Answer: C: Incidence of disease among exposed divided by incidence of disease among non-exposed 
Explanation: Ans. is 'c' i.e., Incidence of disease among exposed divided by incidence of disease among non-exposed