What is the abbreviation for liter?

The abbreviation for liter is typically represented by an uppercase "L." This choice follows international standards for unit symbols, which recommend using capital letters to represent certain units in order to avoid confusion with other symbols; for example, the lowercase "l" can be easily mistaken for the number "1." Using "L" as the abbreviation for liter helps maintain clarity and ensures that communication regarding measurements is precise.

The other abbreviations listed do not conform to widely accepted standards for representing the unit of measure for volume, which is why they are not the correct choice.