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': 'What is Nitroblue tetrazolium test used for? \nSelect and explain. \nA. Phagocytosis, B. Complement, C. T cell, D. B cell', 'role': 'user'}, {'content': 'Answer: A \nExplanation: . Phagocytosis', 'role': 'assistant'}]