This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
Intermediate filaments in glial cells are 
Select and explain. 
A. Keratin, B. Desnin, C. GFAP, D. Bone
C: GFAP
Answer: C: GFAP 
Explanation: Intermediate filaments are used as tumor markers GFAP is the intermediate filament present in glial cells, they are used to indicate astrocytoma Ref:Guyton and Hall textbook of medical physiology 12th edition,page number:8,9,14