This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Social & Preventive Medicine
Denominator of Literacy rate is 
Select and explain. 
A. Total population, B. Total population ≥ 7 years of age, C. Total male population of ≥ 7 years of age, D. Number of school going children
B: Total population ≥ 7 years of age
Answer: B: Total population ≥ 7 years of age 
Explanation: None