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
Which of the following is true about Human Development Index: 
Select and explain. 
A. Maternal mortality rate, B. IMR, C. Life expectancy- Birth, D. Life expectancy- 1 year
C: Life expectancy- Birth
Answer: C: Life expectancy- Birth 
Explanation: Ans. (c) Life expectancy BirthRef: K. Park 23rd ed. /17PQLI (Physical Quality of Life IndexHDI (Human Development Index)Literacy rateLiteracy rateInfant mortality rateIncomeLife expectancy (at 1 year)Life expectancy () birth)Range: 0 and 100Range: 0 and +1Value in India: 650.547Also Know* Range of correlation coefficient; 1 to +1