This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Anatomy
Class I histocompatibility antigens are expressed on all except 
Select and explain. 
A. Macrophage, B. Lymphocyte, C. Platelets, D. Red Blood Cells
B: Lymphocyte
Answer: B: Lymphocyte 
Explanation: Class I histocompatibility antigens are expressed on all nucleated cells and platelets