The correct option is C CO2 + H2O + Energy
Respiration is the oxidation of food to release energy. And it can take place in the prsence or absence of oxygen,
When glucose is oxidized in the presence of oxygen, energy is released in the form of ATP along with the byproducts like CO2 and water vapors are produced in this process. It can be given as:
Glucose+Oxygen→ CO2 + H2O + Energy
(C6H12O6)