Which of the following is NOT considered a common solvent?

Vegetable oil is not considered a common solvent because it is primarily a triglyceride fat, which does not dissolve a wide range of substances in the way that traditional solvents do. Common solvents typically have the ability to dissolve salts, organic compounds, or other substances easily and are used in various applications like cleaning, paint thinners, and chemical reactions.

Acetone, for example, is a widely used solvent known for dissolving many organic compounds effectively, particularly in laboratory and industrial settings. Break clear is typically a brand name for a cleaner that can act as a solvent, especially for oils and grease. Camp fuel usually refers to substances like naphtha or kerosene, which can also act as solvents for a number of materials. Therefore, vegetable oil stands out as a non-solvent in this context due to its composition and lack of solvent characteristics compared to the other options listed.