<prompt> The total body radical burden can be estimated by which of the following methods?FOX AssayEstimation of DialdehydesMeasurement of Pentane and Methane in exhaled airAll of the above  <response>: The total body radical burden can be estimated by measuring the products of lipid peroxidation:FOX Ferrous Oxidation in Xylenol Assay Lipid peroxides can be measured by the ferrous oxidation in xylenol orange FOX assay. Under acidic conditions, they oxidize Fe 2 to Fe 3, which forms a chromophore with xylenol orange.Estimation of Dialdehydes The dialdehydes formed from lipid peroxides can be measured by reaction with thiobarbituric acid, when they form a red fluorescent adduct. The results of this assay are generally reported as total thiobarbituric acid reactive substances,TBARS.Measurement of Pentane and Methane in Exhaled air Peroxidation of ω-6 polyunsaturated fatty acids leads to the formation of pentane, and of-ω3 polyunsaturated fatty acids to ethane, both of which can be measured in exhaled air.Reference- Review of biochemistry by Rebecca James Perumcheril Pg-412 