Find ‘x’ and ‘y’ in order to balance the given equation.
${\text{C}}_6{\text{H}}_{12}{\text{O}}_6+x{\text{O}}_2\to 6{\text{CO}}_2+y{\text{H}}_2\text{O}$

The correct option is D x = 6; y = 6
Balanced chemical equation for respiration:
${\text{C}}_6{\text{H}}_{12}{\text{O}}_6+6{\text{O}}_2\to 6{\text{CO}}_2+6{\text{H}}_2\text{O}$
For a chemical equation to be balanced, it should follow the law of conservation of mass, i.e. mass can neither be created nor destroyed.
OR,
Total number of each atom on the reactant side = Total number of each atom on the product side
C: 6
H: 12
O: 18