Hydrocarbons are composed of the elements
(1) carbon and hydrogen, only
(2) carbon and oxygen, only
(3) carbon, hydrogen and oxygen
(4) carbon, nitrogen and oxygen

From the name Hydrocarbons, they are composed of Hydrogen and Carbon only.

So it is (1)

Most likely a is the answer - because  you generate   38 atp's but also consume an atp.   each atp gives approx. less than 4 kcal so probably a is the closest answer.