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 the most common type of Glial tumors? \nSelect and explain. \nA. Astrocytomas, B. Medulloblastomas, C. Neurofibromas, D. Ependymomas', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Robbins and cotran Pathologic basis of disease-south asia edition,9 edition. *Astrocytomas are the most common gliomas.', 'role': 'assistant'}]