Reduction potenti A. ClO₄^–→ IO₄^–→ BrO₄^–

B. IO₄^–→ BrO₄^–→ ClO₄^–

C. BrO₄^–→ IO₄^–→ ClO₄^–

D. BrO₄^–→ ClO₄^–→ IO₄^–

REDUCTION POTENIAL: reduction potential is a measure of the ease with which a molecule will accept electrons.

OXIDISING POWER: it is the ability to gain electrons.

Therefore oxidizing power is directly proportional to reduction potential.

Greater is the reduction potential, more will be its oxidizing power.

Hence the order is BrO₄^–> IO₄^–>ClO₄

Thus the correct option is (iii).