This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nutrition, Subject name: Medicine
[{'content': "All are feature of Wernicke's encephalopathy,Except: \nSelect and explain. \nA. Cogwheel rigidity, B. Alteration in mental function, C. 6th nerve palsy, D. Ataxia", 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' Cogwheel rigidity (Ref Harrison, 16/e, p 1636 (15/e, p 2496)).Wernicke's disease is seen in Alcoholic* patients with chronic thiamine deficiency*.The characteristic clinical trial is that of:Global confusionOphthalmoplegia Ataxia Mnemonic: GOAOther ocular motor abnormalities include:horizontal nystagmus on lateral gaze,conjugate gaze palsies*rarely ptosis*Pupil are usually spared but they may become miotic.When there is an additional loss of memory and a confabulatory psychosis, the syndrome is known as Wernicke- Korsakoff syndrome *.", 'role': 'assistant'}]