Answer: Water is one of the ending compound during cellular respiration.
Step-by-step explanation
Cellular respiration are the set of metabolic reaction which takes place in cells of the organism to convert energy from nutrient molecules to biochemical reaction into ATP (adenosine phosphate).
It is generally a combustion reaction which takes place in the presence of oxygen molecule. Carbon-dioxide , water and heat are products which are produced this process. Due to release of heat it is also categorize as Exothermic reaction.
Hence, from the given options water is correct answer.