A nurse is preparing an in-service program about preventing medication errors when transcribing a prescription. The nurse is using a dosage example of two tenths of a milligram. Which of the following examples should the nurse use to show appropriate transcription of this dosage?

The correct answer is C: 0.2 mg. When transcribing a dosage of two tenths of a milligram, it should be expressed as 0.2 mg, as 0.2 is equivalent to two tenths. Choice A (20 mg) is incorrect because it represents twenty milligrams, which is significantly higher than two tenths of a milligram. Choice B (0.20 mg) is incorrect as it represents two hundredths of a milligram, not two tenths. Choice D (2.0 mg) is incorrect as it represents two milligrams, which is ten times more than two tenths of a milligram. Therefore, choice C is the correct representation of the dosage of two tenths of a milligram.