<prompt> Common posterior cranial fossa tumours include all of following except -MedulloblastomaOligodendrogliomaEpendymomaCystic astrocytoma  <response>: Ans. is b i.e., Oligodendroglioma o Oligodendrogliomas are uncommon tumours of childhood, occur predominently in the cerebral coex and originate in white matter Supratentorial. Common childhood infratentorial post fossa tumors 1 Cerebellar astrocytoma cystic astrocytoma 3 Brainstem glioma 2 Medulloblastoma Primitive neuroectodermal tumor 4 Ependymoma 