<prompt> All of the following enzymes may contribute in generating free oxygen radicals within neutrophils for killing intracellular bacteria, except:Superoxide DismutaseFentons reactionNADPH oxidaseGlutathione Peroxidase  <response>: Glutathione peroxidase is an enzyme which works as an antioxidant. It catalyses the reaction in which H2O2 is conveed into water. So it does not generate free radicals. Ref: Robbins pathologic basis of disease 6th ednpage 12,13,14. 