This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Biostatistics, Subject name: Social & Preventive Medicine
[{'content': 'If hemoglobin status of a population with mean value is 10.3 gm % with SD 2 gm%, then 5% population will be below what value of Hb? \nSelect and explain. \nA. 6.67, B. 7.35, C. 9, D. 8.6', 'role': 'user'}, {'content': 'Answer: B \nExplanation: .', 'role': 'assistant'}]