Reduction potentials of some ions are given below. Arrange them in decreasing order of oxidizing power.
Ion ClO₄− IO₄− BrO₄−
Reduction potential E∘/V E∘= 1.19V E∘= 1.65V E∘= 1.74V

a. ClO₄⁻ > IO₄⁻ > BrO₄⁻
b. IO₄⁻ > BrO₄⁻ > ClO₄⁻
c. BrO₄⁻ > IO₄⁻ > Cl₄⁻−4
d. BrO₄⁻ > ClO₄⁻> IO₄⁻