Brain Tumors Are Either Malignant or Benign,depending on the Cell

Multiple Choice

Brain tumors are either malignant or benign,depending on the cell type.Primary tumors generally do not resemble the carcinomas and sarcomas found elsewhere in the body and rarely metastasize outside the CNS.Both primary and metastatic tumors of the brain and its membranes are included in the term intracranial tumors.What three tumor types are the most frequently seen CNS tumors in adults?

A) Meningioma,oligodendroglioma,and glioblastoma
B) Glioblastoma,meningioma,and astrocytoma
C) Medulloblastoma,meningioma,and neurilemmoma
D) Astrocytoma,hemangioma,and sarcoma