Please answer it ASAP

Dear student,

The compound zinc oxide is known as Philospher's wool. It is prepared by the residue obtained by heating zinc oxide in air. Residue is converted into white woolly tufts.

When philosopher's wool is heated in presence of BaO at 1100⁰ C it gets converted into BaZnO2
$\text{ZnO + BaO }\stackrel{1100 °}{\to }{\text{BaZnO}}_{\text{2}}$
So, the correct option is c) ​BaZnO2