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: Microbiology
CD4 cells recognize the antigens in association with 
Select and explain. 
A. MHC I, B. MHC II, C. MHC III, D. B-cell receptor
B: MHC II
Answer: B: MHC II 
Explanation: None