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's encephalopaty involves which part of CNS -a) Mammillary bodyb) Thalamusc) Frontal lobed) Arcuate fasciculus \nSelect and explain. \nA. ac, B. a, C. ab, D. bc", 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]