Which of the following is isoelectronic pair ?

Options

A. `Icl_(2), ClO_(2)`
B. `BrO_(2)^(-), BrF_(2)^(+)`
C. `ClO_(2), BrF`
D. `CN^(-), O_(3)`

Answer

B

Explanation

`BrO_(2)^(-) " and " BrF_(2)^(+)` ions are isoelectronic in nature. Both have (35+17)=52 electrons.