What are the 3 MC primary brain tumors in adults
a) Glioblastoma multiforme, meningioma, and schwannoma
b) Medulloblastoma, ependymoma, and oligodendroglioma
c) Glioblastoma multiforme, pituitary adenoma, and astrocytoma
d) Glioblastoma multiforme, craniopharyngioma, and hemangioblastoma