ANSWER
[tex]\begin{gathered} \text{ 2KBr }+\text{ CaO }\rightarrow\text{ K}_2O\text{ }+\text{ CaBr}_2 \\ Option\text{ B} \end{gathered}[/tex]EXPLANATION
Given that;
The two reactants are KBr and CaO
Double replacement reaction is a type of chemical reaction that occur when two reactants exchange cations and anions to yield new products.
[tex]\text{ 2KBr + CaO }\rightarrow\text{ K}_2O\text{ + CaBr}_2[/tex]Therefore, the resulting products of the given data are K2O + CaBr2
The correct answer is option B