This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Non communicable diseases, Subject name: Social & Preventive Medicine
Incalculating the literacy rate, which parameter is taken into account? 
Select and explain. 
A. Age above 7 years, B. Schooling upto 10th class, C. Schooling upto 15 years, D. Whole population
A: Age above 7 years
Answer: A: Age above 7 years 
Explanation: Literacy (India) : Any person who can read and write with understanding, in any one language of India who is >7 years of age (definition used in 1991 & 2001 census) Literacy rate : Denominator is population >7 years age Crude literacy rate : Denominator is total population (used earlier) Literacy rate (India) : 75.04% (census 2011) Literacy rate by sex : Males - 82% & Females - 65% Literacy rate by state : Maximum 94%(Kerala) & Least 64%( Bihar) Ref: Park 25th edition Pgno : 537