The most malignant brain tumour is
(D) Glioblastoma multiforme # Glioblastoma multiforme (GBM), WHO classification name "glioblastoma", also known as Grade IV Astrocytoma, is the most common and most aggressive malignant primary brain tumor in humans, involving glial cells and accounting for 52% of all functional tissue brain tumor cases and 20% of all intracranial tumors.
Ependymoma
Medulloblastoma
Oligodendroglioma
Glioblastoma multiforme
Nervous System