This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: FMGE 2017, Subject name: Medicine
[{'content': "Wernicke's encephalopathy is due to deficiency of: \nSelect and explain. \nA. Thiamine, B. B6, C. Niacin, D. B12", 'role': 'user'}, {'content': "Answer: A \nExplanation: Pa of the Brain that would be damage in this case would be periventricular area's in thalamus. G: Global confusion O: Ophthalmoplegia: 6th N palsy (diplopia on looking laterally) A: Ataxia -sensory Ataxia -Cerebellar Ataxia -Vestibular Ataxia (1st to respond to medical treatment: Ophthalmoplegia.) B1 Beri Beri B2 Angular stomatitis B3 pellagra B5 Burning foot syndrome B6 anemia B12 Megaloblastic anemia and subacute degeneration of spinal cord Folic acid Neural tube defect Vit c scurvy Vit a Eye Vit d Rickets and osteomalacia", 'role': 'assistant'}]