A student nurse makes the following statements regarding the units of measurements commonly found on drug labels. Which statement indicates a need for further clarification?

The units of measurement on drug labels help to identify the strength of the drug.

The unit of measurement labeled "unit" expresses the biological activity of the drug.

The mL, L, and meter are units of measurement found in the metric system.

The mEq unit of measurement has the same concentration of solution as the mcg.