<prompt> Incidence rate is measured by -Case control studyCoho studyCross sectional studyCross over study  <response>: Ans. is b i.e., Coho study Coho study analyses the following data :?1 Incidence rate among exposed and nonexposed2 Estimation of riska Relative risk risk ratiob Attributable risk risk differencec Population attributable riskIncidence rateo In coho study, incidence rate can be determined directly in those exposed and nonexposed. 