Which of the following is NOT a component of LPG?

Liquefied Petroleum Gas (LPG) primarily consists of hydrocarbons, mainly propane and butane. These gases are stored in a liquid form under pressure and are commonly used as fuel for heating, cooking, and power generation. Propane and butane are the main components of LPG, and isobutane, a structural isomer of butane, is also included in certain blends of LPG due to its favorable properties.

Acetylene, on the other hand, is a completely different type of hydrocarbon that is not used as a component of LPG. It is primarily known for its use in welding and cutting applications due to its high flame temperature when combusted with oxygen. Because acetylene's properties and applications are distinct from those of propane, butane, and isobutane, it does not belong in the category of LPG. Therefore, recognizing that acetylene is not associated with LPG makes it the correct answer in identifying the component that does not belong to the LPG group.