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 one of the following marker is useful in differentiating between mesothelioma and adenocarcinoma. 
Select and explain. 
A. CEA, B. Cytokeratin, C. Calretinin, D. TTF
C: Calretinin
Answer: C: Calretinin 
Explanation: Calretinin > Cytokeratin
(5/6. because here only cytokeratin is used not 5/6)

Best positive mesothelioma markers - Calretinin, CKS and CK 5/6.
Best positive lung adenocarcinoma markers - TTF 1 and Napsin.