<prompt> A 5 year old child is admitted with headache, vomitting and diffifculty in walking. Physical findings include truncal ataxia, papilloedema and left lateral recuts palsy. No finger-to-nose ataxia could be detected on the left side or right side. The most likely diagnosis is-Dandy walker syndromeSyringobulbiaArnold-chiari malformationMedulloblastoma  <response>: Ans. is d i.e., Medulloblastoma o Congenital lesions would present Hydrocephalus since bih for a c 