Among the following balanced chemical equation is

In a balanced chemical equation, the total no. of atoms present in the left hand side of the chemical equation is equal to total no. of atoms present in the right hand side of the chemical equation.

b) ${\text{2H}}_{\text{2}}+{\text{O}}_{\text{2}}\to {\text{2H}}_{\text{2}}\text{O}$

${{\text{2KNO}}_{\text{3}}}_{\left(s\right)}\to {{\text{2KNO}}_{\text{2}}}_{\left(s\right)}+{\text{O}}_{\text{2(g)}}$

${\text{2C}}_{\text{(s)}}+{\text{O}}_{\text{2(g)}}\to {\text{2CO}}_{\text{(g)}}$