The correct answer is C) LNG contains smaller quantities of a heavier hydrocarbon known as NGL. Explanation: 1) LNG, or Liquefied Natural Gas, is primarily composed of methane, but it can also contain smaller quantities of heavier hydrocarbons known as Natural Gas Liquids (NGLs), such as ethane, propane, and butane. 2) The statement in C is correct because LNG, as a natural gas product, can contain these NGL components, which are heavier hydrocarbons. 3) The other options are incorrect - A and B are false statements, as LNG is not a pure substance and does not contain a hydrocarbon called "pantene." Option D is also incorrect, as NGL does not contain smaller quantities of LNG. 4) In summary, the correct answer is C, as it accurately describes the composition of LNG and its relationship to the heavier NGL hydrocarbons.