Mosquitoes have thin, long bodies and three pairs of extremely long legs. They have scales along the veins of their wings and long beak-like, sharp sucking mouth parts called a proboscis. These two features distinguish mosquitoes from other flies. Mosquitoes also have feathery or hairy antennae.
The body of mosquito is differentiated into head, thorax and abdomen with a short and mobile neck joining the head with the thorax.-biologydiscussion.com
The correct answer is (D) carbon dioxide. Oxygen will always be taken in and carbon dioxide released, never anything else regardless of the organism. I hope I helped! :)
