<prompt> Which is the best index for burden of disease and effectiveness of interventionsCase fatality rateDisability adjusted life yearsDependent ratioMorbidity data  <response>: Disability adjusted life years DALYs : Is a measure of the burden of disease in a defined population and the effectiveness of interventions; it expresses years lost to premature death and years lived with disability adjusted for its severity. Ref : Park 25th edition Pgno : 26 