Natural gas is available in which two forms?

Answer: B — Compressed natural gas (CNG) and Liquefied natural gas (LNG)

Natural gas is primarily available in two forms: Compressed Natural Gas (CNG) and Liquefied Natural Gas (LNG). Compressed Natural Gas (CNG) is natural gas that has been compressed to less than 1% of its volume at standard atmospheric pressure, making it easier to store and transport, especially for vehicles that run on natural gas. It remains in a gaseous state but is highly pressurized, allowing more gas to fit into a given volume. Liquefied Natural Gas (LNG), on the other hand, is natural gas that has been cooled to a liquid state at about -162 degrees Celsius (-260 degrees Fahrenheit). This process reduces the volume of the gas significantly, making it efficient for transport over long distances, particularly where pipeline infrastructure is not feasible. The other options mentioned do not accurately represent the forms of natural gas. Propane and Butane are both hydrocarbons but are not forms of natural gas; rather, they are byproducts of natural gas processing and refining. Synthetic gas refers to gas produced from the gasification of carbon-containing materials but is not a natural form of natural gas itself. Therefore, the correct identification of the two forms of natural gas is indeed through CNG and LNG.