<prompt> Incidence of disease among exposed divided that of non exposed is equal to -Relative riskAttributable riskOdd ratioNone of the above  <response>: Ans. is a i.e., Relative risk RR Incidence of disease among exposed---Incidence of disease among nonexposed AR Incidence of disease in exposed - Incidence of disease in unexposed---Incidence of disease in exposedx 100 