Which of the following is the abbreviation for "Gram"?

The abbreviation for "Gram" is commonly represented as "g." While "gm" was historically used, the standard and preferred abbreviation in the medical and scientific communities is simply "g." This usage aligns with the International System of Units (SI), where "g" denotes gram as a unit of mass. Understanding the appropriate abbreviation is essential for accurate communication in medication administration and dosage calculations, where precision in measurements is crucial for patient safety.

Other options are related to different units of measurement: "gr" stands for grain, which is a different unit of weight, and "ml" refers to milliliters, a unit of volume. Recognizing these distinctions helps ensure clarity in medical orders and prescriptions.