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
Cohort study estimates all except- 
Select and explain. 
A. Incidence, B. Relative risk, C. Odds ratio, D. Attributable risk
C: Odds ratio
Answer: C: Odds ratio 
Explanation: Ans. is 'c' i.e., Odds ratio Epidemiological studyParameter obtained* Case control studyOdds ratio* Cohort studyIncidence rateRelative riskAttributable riskPopulation attributable risk* Cross - sectional studyPrevalence* Ecological studyGroup characteristics