Answer:
D). Total number of hydrogen atoms in carbon dioxide and oxygen.
Step-by-step explanation:
Cellular respiration is demonstrated as the metabolic process that occurs within the cells and involves the conversion of biochemical energy or glucose by breaking it down in the form of ATP which functions to provide energy to the cell(in its required form).
As per the question, the 'total number of hydrogen atoms(2 moles) in carbon-dioxide and oxygen' would be equivalent to the number(total) of hydrogen atoms in the water during the process of cellular respiration. Therefore, option D is the correct answer.