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
[{'content': 'Defect in the following is identified by nitroblue tetrazolium test? \nSelect and explain. \nA. Phagocytosis, B. Complement, C. T cell, D. B cell', 'role': 'user'}, {'content': "Answer: A \nExplanation: Deficiencies of oxidative metabolism (e.g., phagocytosis) are detected with either the nitroblue tetrazolium (NBT) dye test or the dihydrorhodamine (DHR) oxidation test. These tests are based on the ability of products of oxidative metabolism to alter the oxidation states of repoer molecules so that they can be detected microscopically (NBT) or by flow cytometry (DHR). Qualitative studies of superoxide and hydrogen peroxide production may fuher define neutrophil oxidative function. Ref: Gallin J.I. (2012). Chapter 60. Disorders of Granulocytes and Monocytes. In D.L. Longo, A.S. Fauci, D.L. Kasper, S.L. Hauser, J.L. Jameson, J. Loscalzo (Eds), Harrison's Principles of Internal Medicine, 18e.", 'role': 'assistant'}]