This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.N.S, Subject name: Medicine
[{'content': 'Which of the following is true about multiple sclerosis except \nSelect and explain. \nA. Nystagmus on abducting eye, B. Nystagmus on adducting eye, C. One and half syndrome, D. Pendular nystagmus', 'role': 'user'}, {'content': 'Answer: B \nExplanation: . *Multiple sclerosis is characterised by prominent nystagmus which is observed in the abducting eye,along with a small skew detion . *A bilateral internuclear ophthalmoplegia is paicularly suggestive of MS *Other common gaze disturbances in MS include (1) horizontalgaze palsy (2)a "one and half"syndrome (3)acquired pendular nystagmus . Ref Harrison20th edition pg 2567', 'role': 'assistant'}]