This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Neuroradiology, Subject name: Radiology
[{'content': 'A 50 year old man came to the neurology OPD with chief complaints of ataxia and abnormal eye movements. On examination, veical gaze palsy is seen. A MRI was performed . What is the possible diagnosis? \nSelect and explain. \nA. Multiple system atrophy-Cerebellar type, B. Parkinsonism, C. Cerebellar ataxia, D. Progressive supra-nuclear palsy', 'role': 'user'}, {'content': 'Answer: D \nExplanation: HUMMING BIRD SIGN and MICKEY MOUSE SIGN are features of Progressive supranuclear palsy. Figure showing Humming bird sign in Progressive supranuclear palsy. Figure showing Mickey-Mouse sign in Progressive supranuclear palsy.', 'role': 'assistant'}]