While LPG is a mixture of both propane and butane, the proportions vary depending on the season, region, and intended use. Both are major components. However, in some general descriptions or standards, propane might be listed first or considered a slightly more dominant component in certain common mixtures. Option C, Propane, is one of the two chief components listed among the choices. Methane is the main component of Natural Gas, and Ethane is also primarily a component of Natural Gas, not LPG.