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: Radiology
[{'content': 'Eye of tiger sign on MRI is seen in \nSelect and explain. \nA. Hallervorden spatz syndrome, B. Progressive supra nuclear palsy, C. Early onset levodopa - responsive Parkinsonism, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: The eye of tiger sign refers to abnormal low T2 signal on MRI in the globus pallidus with a logitudinal\xa0stripe of high signal (due to gliosis and spongiosis).', 'role': 'assistant'}]