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
Mean Hb values are compared in two population groups. The best test is ? 
Select and explain. 
A. Paired T test, B. Unpaired T test, C. Chi-square test, D. Fisher's test
B: Unpaired T test
Answer: B: Unpaired T test 
Explanation: Ans. is 'b' i.e., Unpaired T test