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
Most effective bactericidal system within phagocytes is: 
Select and explain. 
A. Lysozyme mediated, B. Lactoferrin mediated, C. Reactive oxygen metabolite mediated, D. Cationic basic protein mediated
C: Reactive oxygen metabolite mediated
Answer: C: Reactive oxygen metabolite mediated 
Explanation: The bactericidal action of phagocytes is based on NADPH oxidase induced respiratory burst producing superoxide. Ref: Cherie H. Dunphy, (2010), Chapter 38, "White Blood Cell and Immunodeficiency Disorders", In the book, "Molecular Pathology of Hematolymphoid Diseases", New york, Page 505