A) Butane and propane
B) Methane and ethylene
C) Carbon monoxide and carbon dioxide
D) Carbon dioxide and oxygen
Correct Answer: A
Solution :
[a] Liquefied petroleum gas or liquid petroleum gas (LPG or LP gas), also referred to as simply propane or butane, are flammable mixtures of hydrocarbon gases used as fuel in heating appliances, cooking equipment, and vehicles. It is increasingly used as an aerosol propellant and a refrigerant, replacing chlorofluorocarbons in an effort to reduce damage to the ozone layer. When specifically used as a vehicle fuel it is often referred to as auto gas.
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