This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immune Deficiency Diseases, Subject name: Pathology
[{'content': 'Nitro-blue tetrazolium test is done for? \nSelect and explain. \nA. Chronic glomerulonephritis, B. Chronic granulomatous disorder, C. Acute granulomatous disease, D. Chediak Higashi syndrome', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. (b) Chronic Granulomatous disorderRef: Robbin's pathology 9th ed. /237-238Nitro blue tetrazolium is used in a diagnostic test, particularly for chronic granulomatous disease. When there is an NADPH oxidase defect, the phagocyte is unable to make reactive oxygen species or radicals required for bacterial killing. As a result, bacteria may thrive within the phagocyte. The higher the blue score, the better the cell is at producing reactive oxygen species.", 'role': 'assistant'}]