What would be the best source of drug information for a nurse?

The correct answer is B: A Nurse's Drug Guide/Handbook. This is the best source of drug information for a nurse because it is tailored specifically for nurses, providing practical and concise information on drug administration, interactions, and side effects. The Nurse's Drug Guide is designed to be user-friendly and easily accessible for quick reference in clinical settings. The other choices are not as suitable for nurses: A, the Physician Drug Reference, may contain more complex medical information not relevant to nursing practice; C, a drug package insert, is too detailed and not practical for quick reference; and D, Drug Facts and Comparisons, is more geared towards pharmacists and may contain information beyond the scope of nursing practice.