<prompt> Free radical scavanging system enzyme isNADPH oxidaseGlutathione peroxidaseEndonucleasePhospholipase  <response>: Answer-B. Glutathione peroxidaseAntioxidant mechanisms1. Non-enzymatic systemAntioxidants Vit E , Vit A, Vit C, glutathione and CysteineTissue proteins transferrin, ferritin, laetofeftifl, and ceruloplasmin.2. Enzymatic systemCatalaseSupuoxide damutase SOD3. Glutathione peroxidasePresent in mitochondria cytosol.It catalyzes free radical breakdown.H2O2 2 G S H - G S S G 2 H2O2OH 2 G S H - G S S G 2H2O 