<prompt> Rosenthal fibres are:Intranclear inclusionsIntracytoplasmic inclusionsPresent extracellularlyPart of cell membrane  <response>: Ans. b Intracytoplasmic inclusionsRef: R 9thpg 1253Rosenthal fibers-Brightly eosinophilic structuresinclusions within cytoplasm of Q astrocytic processesContain two heat-shock proteins aB-crystallin and hsp27 as well as ubiquitin QSeen in Alexander disease, pilocytic astrocytoma Q. 