A nurse is assisting in 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 transcription examples should the nurse use?

A. 2.0 mg: This notation indicates two milligrams, which is not equivalent to two tenths of a milligram. B. 0.2 mg: This is the proper way to write two tenths of a milligram. C. .2 mg: While it may be understood, it is not the preferred notation because it lacks a leading zero, which can lead to misinterpretation. D. 0.20 mg: This is technically correct but not necessary. It suggests more precision than needed for two tenths and can be misinterpreted as a larger dose.