Which of the following liberates O₂ upon hydrolysis? 

(A) Pb₃O₄ is insoluble in water or do not react with water. 

$\text{ (B) }2{\mathrm{KO}}_2+2{\mathrm{H}}_2\mathrm{O}\to 2\mathrm{KOH}+{\mathrm{H}}_2{\mathrm{O}}_2+{\mathrm{O}}_{2\left(\mathrm{g}\right)}\uparrow$

$\text{ (C) }{\mathrm{Na}}_2{\mathrm{O}}_2+2{\mathrm{H}}_2\mathrm{O}\to 2\mathrm{NaOH}+{\mathrm{H}}_2{\mathrm{O}}_2$

$\text{ (D) }{\mathrm{Li}}_2{\mathrm{O}}_2+2{\mathrm{H}}_2\mathrm{O}\to 2\mathrm{LiOH}+{\mathrm{H}}_2{\mathrm{O}}_2$