Relative risk is calculated in?
Ans. is 'b' i.e., Cohort study CharacteristicsCohort StudyCase control StudyCross Sectional StudyDesignProspectiveRetrospectiveOne point in timeIncidenceEstimatedNot estimatedNot estimatedPrevalenceNot estimatedNot estimatedEstimatedCalculationso Incidence rateso Relative risko Attributable risko Odds ratio