This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Social & Preventive Medicine
Which is the best index for burden of disease? 
Select and explain. 
A. Case fatality rate, B. Morbidity data, C. Dependency ratio, D. Disability adjusted life years
D: Disability adjusted life years
Answer: D: Disability adjusted life years 
Explanation: Disability adjusted life years : 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