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': 'All of the following statements regarding progressive multifocal leucoencephalopathy are true except \nSelect and explain. \nA. Patient commonly presents with visual disturbances and speech defects, B. It is most commonly seen in immunocompromised persons, C. Diagnosis is frequently suggested by MRJ, D. It follows an indolent course and patient usually dies within 6 months', 'role': 'user'}, {'content': "Answer: A \nExplanation: Harrison's principles of internal medicine 17th edition. * Almost all patients with PML have an underlying immunosuppressive disorder.demyelination is distributed throughout brain sparing spinalcord and optic nerve. The diagnosis of PML is frequently suggested by MRI.No effective therapy is available and patient usually dies within 6 months", 'role': 'assistant'}]