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
MHC class l are present on all except 
Select and explain. 
A. Platelet, B. All nucleated cells, C. RBC, D. WBC
C: RBC
Answer: C: RBC 
Explanation: Ref Robbins 8/e p190;9/e p194 class I MHC molecules are present on all nucleated cells, all virus-infected cells can be detected and eliminated by CD8+ CTLs. Hence not present on RBC because they are not nucleated