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
Which of the following is a squamous cell carcinoma marker? 
Select and explain. 
A. Vimentin, B. Dermin, C. Cytokeratin, D. Glial fibrillary acid protein
C: Cytokeratin
Answer: C: Cytokeratin 
Explanation: The presence of cytokeratins detected by immunohistochemistry, points to an epithelial origin (Carcinoma) where as dermin is specific for neoplasm of muscle cell origin.