N.K. cell and cytotoxic cells are differentiated by ?: (A) Interferons reduce N.K. cell activity, (B) Antibody specificity, (C) Receptor for IgG, (D) Presence in spleen
Answer is B. Ans. is 'b' i.e., Antibody specificity . Cytotoxicity of NK cells is not antibody dependent or MHC restricted, while cytotoxic cells are capable of lysing or killing target cells sensitized with antibody.