Which of the following is the correct abbreviation for meter?

The correct abbreviation for meter is "m." In the metric system, "m" stands for meter and is the standard unit of length. It is part of the International System of Units (SI), which provides a global standard for measurement. The use of "m" as an abbreviation helps maintain consistency and clarity in scientific and medical contexts.

Other options refer to different measurements: "mm" stands for millimeter, which is one-thousandth of a meter; "in" represents inches, which is a unit of measurement commonly used in the United States that does not belong to the metric system; and "pt" stands for pint, a unit of volume rather than length. Understanding these distinctions is crucial for accurately conveying measurements in a medical setting.