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
Sullivan index is an index for - 
Select and explain. 
A. Life free of disability, B. Life expectancy, C. Earning capacity, D. Population index
A: Life free of disability
Answer: A: Life free of disability 
Explanation: Ans. is 'a' i.e., Life free of disability