Assertion (A) : The main constituent of the Liquefied Petroleum Gas is methane. Reason (R) : Methane can be used directly for burning in homes and factories where it can be supplied through pipelines.

Assertion (A) is incorrect: Liquefied Petroleum Gas (LPG) is composed primarily of propane and butane (with propane often the main component), not methane, so methane is not the main constituent of LPG. Reason (R) is correct: methane is the primary component of natural gas and is commonly supplied via gas mains/pipelines for direct burning in homes and industry, making it suitable for pipeline distribution and direct use as a fuel [1]. Thus A is false while R is true; R does not explain A because the subject gases and their typical supply methods are different entities (LPG is bottled/pressurized propane/butane, natural gas is pipeline methane) [1].

Sources

1. [1] Environment and Ecology, Majid Hussain (Access publishing 3rd ed.) > Chapter 9: Distribution of World Natural Resources > natural gas as a Resource > p. 15