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': 'Which among the following does not cause exaggerated jaw jerk - \nSelect and explain. \nA. Multiple sclerosis, B. Motor neurone disease, C. Pseudobulbar palsy, D. Syringomyelia', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]