Which of the following arrangements represent increasing oxidation number of the central atom?
1
\(\rm CrO^-_2, \ CIO^-_3, \ CrO^{2-}_4, \ MnO^-_4\)
2
\(\rm CIO^-_3, \ CrO^{2-}_4, \ MnO^-_4,\ CrO^-_2\)
3
\(\rm CrO^-_2, \ CIO^-_3,\ MnO^-_4,\ CrO^{2-}_4\)
4
\(\rm CrO^{2-}_4,\ MnO^-_4,\ CrO^{-}_2,\ CIO^-_3\)