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': "Pulfrich effect is seen in - \nSelect and explain. \nA. Multiple sclerosis, B. Gullian Barre syndrome, C. Parkinson's disease, D. Alzheimer's disease", 'role': 'user'}, {'content': 'Answer: A \nExplanation: Answer- A. Multiple sclerosisThe Pulfrich effect is a sign of optic neuritis seen in patients with Multiple sclerosis.The Pulfrich effect is a psychophysical percept wherein a two dimensional lateral motion of an object in the fietd of view is interpretd by the visual coex as having a depth component (three dimensional), due to a relative difference in signal timings between the two eyes.', 'role': 'assistant'}]