Multiple choice _________ is used as a fuel in automobiles. Liquefied Natural Gas (LNG) Compressed Natural Gas (CNG) Liquefied Petroleum Gas (LPG) All of the above Reveal answer Fill a bubble to check yourself D Correct answer Explanation CNG is used as a fuel in automobiles. CNG is a cleaner fuel. LPG and LNG are also used as a fuel in automobiles, though not as commonly as CNG.