This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Pathology
[{'content': 'Most common glial tumor \nSelect and explain. \nA. Ependymomas, B. Astrocytoma, C. Meningioma, D. Neurofibroma', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Astrocytomas are the most common tumours among all other gliomas .....and in astrocytoma infiltrating type has an occurrence of 80 percent of all cases. REF : Robbins and cotrans , 9e , pg : 1306', 'role': 'assistant'}]