Which of the following aqueous solutions are good buffer systems?.0.26Mammoniumbromide+0.34Mammonia0.26Mnitric acid+0.17Mpotassiumnitrate0.19Mpotassium hydroxide+0.20Mpotassiumbromide0.34Mhypochlorous acid+0.26Msodiumhypochlorite0.14Macetic acid+0.20Msodiumacetate
