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 are used as: 
Select and explain. 
A. Tumor markers, B. Carbohydrates, C. Both, D. None
A: Tumor markers
Answer: A: Tumor markers 
Explanation: Intermediate filaments are used as tumor markers Epithelial cells have:keratin Muscle cells: desnin Connective tissue:vimentin Glial cells:GFAP Nucleus:lamin Ref:Guyton and Hall textbook of medical physiology 12th edition,page number 8,9,14