Unit is commonly abbreviated as which of the following?

The abbreviation for the term "unit" is indeed typically represented as "unit." In medical and scientific contexts, the word "unit" is often used to define a specific quantity or measurement that is standardized for use in various fields, such as pharmacology, laboratory testing, and more. Therefore, the unmodified term "unit" serves as a straightforward and unambiguous way to refer to this measure.

While the other options correspond to different units of measurement—"pt" stands for pint, "gal" stands for gallon, and "in" stands for inch—none of these represent the concept of a generic unit. Each of them signifies specific quantities related to volume or length, rather than the general term for a measurement. Thus, the abbreviation for "unit" remains the most accurate choice in this context.