<prompt> 5 year old child with posterior fossa mass. Biopsy from the mass shows the following rosettes.Homer Wright rosettePerivascular pseudorosetteFlexner Wintersteiner rosetteNone  <response>: Ans. a Homer Wright rosettesType of pseudo rosette in which differentiated tumor cells surround the neuropil seen in neuroblastoma, medulloblastoma, pinealoblastoma 