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
[{'content': "Mean Hb values are compared in two population groups. The best test is ? \nSelect and explain. \nA. Paired T test, B. Unpaired T test, C. Chi-square test, D. Fisher's test", 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Unpaired T test", 'role': 'assistant'}]