Which metal oxide among the following gives H 2 O 2 on treatment with dilute acid?

The oxide that gives ${\mathrm{H}}_2{\mathrm{O}}_2$ on treatment with dilute acid is ${\mathrm{BaO}}_2$ because ${\mathrm{BaO}}_2$ contains superoxide ions

When barium superoxide is treated with dilute acid then it gives oxide and hydrogen peroxide

${\mathrm{BaO}}_2 + {\mathrm{H}}_2{\mathrm{SO}}_4 \to {\mathrm{BaSO}}_4 + {\mathrm{H}}_2{\mathrm{O}}_2$