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
Positive indicator of health - 
Select and explain. 
A. IMR, B. Child mortality rate, C. MMR, D. Life expectancy
D: Life expectancy
Answer: D: Life expectancy 
Explanation: Ans. is 'd' i.e., Life expectancy Mortality indicatorso These arei) Crude death rateii) Expectation of life (life expectancy)iii) Infant mortality' rateiv) Child mortality ratev) Under-5 proportional mortalitv ratevi) Maternal mortality ratevii) Disease specific mortality' rateviii) Age specific death rateix) Adult mortality ratex) Years of potential life losto Among these only life expectancy is a positive mortality indicator, i.e. increase life expectancy means improvement in health.o All other are 'negative' health indicators, i.e. increase value of these indicators implies poor health of community.