This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immunology, Subject name: Microbiology
Killer cells are associated with type....immunologic response - 
Select and explain. 
A. Type I, B. Type II, C. Type III, D. Type IV
B: Type II
Answer: B: Type II 
Explanation: A form of type II hypersensitivity is called antibody-dependent cell-mediated cytotoxicity (ADCC). Here, cells exhibiting the foreign antigen are tagged with antibodies (IgG or IgM). These tagged cells are then recognized natural killer cells (NK) and macrophages ( the Fc region) to the effector cell surface receptor, CDCD16, which in turn kill these tagged cells. Ref: www.mayoclinic.com