Chlorophyll is found in chloroplasts, and it absorbs certains lights but the green light is reflected, not absorbed, and that's why the plants appear green. As the green light is not absorbed, options A and B are incorrect.
Chlorophyll is not involved in cellular respiration, it is involved in photosynthesis. Therefore, D is also wrong.
Lots of enzymes help in photosynthesis and they are found in chlorophyll, therefore C is the correct answer.
