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': 'Pure motor paralysis is seen in - \nSelect and explain. \nA. Polio, B. Guillain Barre syndrome, C. Diabetes mellitus, D. Sub-Acute Combined Degeneration', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]