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 statement is not true regarding NK cells 
Select and explain. 
A. NK cells have CD markers 16, 56, B. They mediate antibody dependent cell mediated cytotoxicity, C. They are MHC I restricted, D. Reduced expression of MHC Class I moleules favours cytotoxicity of NK cells.
C: They are MHC I restricted
Answer: C: They are MHC I restricted 
Explanation: NK cells are not MHC restricted.