This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Medicine
[{'content': 'Which of the following sites is responsible for the amnestic defect in Wernicke&;s Korsakoff syndrome: \nSelect and explain. \nA. Mamillary body, B. Thalamus, C. Periventricular Grey matter, D. Hippocampus', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The Amnestic effect in Wernicke&;s Korsakoff Syndrome is related to lesions in the dorso-medial nuclei of the thalamus. REF: Harrison book of internal medicine 21ST EDITION', 'role': 'assistant'}]