Answer: Option (B) is the correct answer.
Step-by-step explanation:
Natural gas is defined as the gas which is formed naturally beneath the surface of Earth that mostly contains methane and small amounts of ethane, propane etc.
Since, natural gas upon burning produces water and carbon dioxide resulting in the release of a clean gas as compared to other fuels. Carbon dioxide produced upon burning of natural gas is 50-60% lesser in amount as compared to release of carbon dioxide upon burning of coal.
Therefore, we can conclude that burning coal produces more carbon dioxide than burning natural gas.