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: Medicine
[{'content': 'All the following are features of Guillain-Barre syndrome except - \nSelect and explain. \nA. Predominant motor involvement, B. Residual disability, C. Absence of pleocytosis in CSF, D. Sparing of bladder function', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]