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
According to 1991 census family size is - 
Select and explain. 
A. 2.4, B. 5.5, C. 4.4, D. 5.9
B: 5.5
Answer: B: 5.5 
Explanation: According to 1991 census average house hold size is 5.5. According to 2001 census it has declined to 5.3 Ref: Census of India, GOI