Incidence is calculated by-
Ans. is 'b' i.e., Prospective study o Incidence rate is measured by cohort study, also known as prospective study.Epidemiological studyParameter obtainedo Case control studyOdds ratioo Cohort studyIncidence rateRelative riskAttributable riskPopulation attributable risko Cross - sectional studyPrevalenceo Ecological studyGroup characteristics
Retrospective study
Prospective study
Cross sectional study
Random study
Epidemiological Study