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
[{'content': 'Phagocytic function is assessed by - \nSelect and explain. \nA. Proloiferative response to mitogen, B. Reduction of NBT (Nitroblue tetrazolium test), C. Serum immunoglobulin assay, D. Skin test with purified protein derivative', 'role': 'user'}, {'content': "Answer: B \nExplanation: Lucocytes from the patients in chronic granulomatous disease fail to reduce nitroblue tetrazolium during phagocytosis. This nitroblue tetrazolium test access the phagocytic activity of leucocytes. Reference : Anathanarayan & paniker's 9th edition, pg no: 175 <\\p>", 'role': 'assistant'}]