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(a) 1,1-diphenyl-2-picrylhydrazyl radical scavenging activity of different plants and (b) ferric reducing antioxidant power activity of the methanolic crude extract of all the four plants and (c) thiobarbituric acid reactive species activity of the methanolic crude extract of all the four plants. All values are significantly different at P < 0.05 compared to ascorbic acid
