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': 'Burning test syndrome is seen due to deficiency of \nSelect and explain. \nA. Vitamin B3, B. Vitamin B5, C. Vitamin B6, D. Vitamin B7', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]