Answer: carbon dioxide and water
Step-by-step explanation:
Fossil fuels are fuels formed in the earth from plant or animal remains. It is mostly composed of coal, natural gas and petroleum.
Combustion is a type of chemical reaction in which fuel is reacted with oxygen to form carbon dioxide and water.
As all the given substances contain carbon and hydrogen as its constituents, all will form carbon dioxide and water on reacting with oxygen.
Example: Combustion of methane