This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Systemic Pathology, Subject name: Pathology
Rosenthal fibres are seen in which of the following tumor? 
Select and explain. 
A. Pilocytic astrocytoma, B. Glioblastoma, C. Medulloblastoma, D. Ependymoma
A: Pilocytic astrocytoma
Answer: A: Pilocytic astrocytoma 
Explanation: On microscopic examination of pilocytic astrocytoma, the tumor is composed of bipolar cells with long, thin "hairlike" processes that are GFAP-positive and form dense fibrillary meshworks. Rosenthal fibers and eosinophilic granular bodies, are often present.