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: Pathology
[{'content': 'Which of the following vitamin is associated with manifestations of neurological problem \nSelect and explain. \nA. Vit A, B. Vit K, C. Folic acid, D. Cyanacobalamin', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]