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: Psychiatry
[{'content': 'Wernicke-korsakoff syndrome is due to the deficiency of which of the following - \nSelect and explain. \nA. Pyridoxine, B. Thiamine, C. Vitamine B12, D. Riboflavin', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]