This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
Rosenthal fibres in astrocytoma are composed of - 
Select and explain. 
A. Heat shock proteins, B. Fibrillar proteins, C. GFAP, D. Globulins
C: GFAP
Answer: C: GFAP 
Explanation: Ans. is 'c' i.e., GFAP o Rosenthal fibers are found in astrocytic processes and are thought to be clumped intermediate filament proteins. Their components include glial fibrillary acidic protein (GFAP).