This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Indicators of Health, Subject name: Social & Preventive Medicine
Sullivan index indicates: 
Select and explain. 
A. Life free of disability, B. Hookworm eggs/ gm of stool, C. Standard of living, D. Pregnancy rate per HWY
A: Life free of disability
Answer: A: Life free of disability 
Explanation: Ans. (a) Life free of disability* The simplest index of health which incorporates morbidity as well as mortality is Sullivan's Index of Disability-Free Life Expectancy (DFLE)ALSO REMEMBER* Chandler's Index: Hookworm eggs/gm of stool* Standard of living : Income and occupation, standards of housing, sanitation and nutrition, level of provision of health, educational, recreational and other services* Pregnancy rate per HWY: Pearl Index (Failure rate of Contraceptives)