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 of the following is the MOST useful index for the measure of the burden of disease in a defined population? 
Select and explain. 
A. Park's index, B. Disability adjusted life years, C. Morbidity propoion, D. Case fatality rate
B: Disability adjusted life years
Answer: B: Disability adjusted life years 
Explanation: Disability adjusted life years (DALY) is a measure of the burden of disease in a defined population and the effectiveness of the intervention. Case fatality rate indicates killing power of a disease. REMEMBER: Sullivan's index is the most advanced indicator available for disability Ref: Park's textbook of Preventive and Social Medicine, 21st edition, page-26