This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Primary Immunodeficiency, Subject name: Pediatrics
[{'content': "In genetic deficiency of MPO, the increased susceptibility to infection is due to: \nSelect and explain. \nA. Defective production of Prostaglandins, B. Defective rolling of' neutrophils, C. Inability to produce hydroxyl halide radicals, D. Inability to produce hydrogen peroxide", 'role': 'user'}, {'content': 'Answer: C \nExplanation: In MPO deficiency there is decreased microbial killing because of defective MPO--H2O2 system, so there is an inability to produce hydroxyl halide radicals.', 'role': 'assistant'}]