This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Demography and family planning, Subject name: Social & Preventive Medicine
Life expectancy as per 2015 estimate is 
Select and explain. 
A. 68.3 years, B. 62.3 years, C. 58.1 years, D. 55 years
A: 68.3 years
Answer: A: 68.3 years 
Explanation: Life expectancy at a given age is the average number of years which a person of that age may expect to live, according to the moality pattern prevalent in that country According to estimates of 2015, the life expectancy at bih for males is 66.90years and that of females is 69.90years. So the life expectancy of population is 68.3years approximately. Reference : Park&;s textbook of preventive and social medicine, 23rd edition, pg no: 486,487