After the nurse hands a client a medication, the client says, "What is this red tablet for? I have always taken a yellow pill." What is the most appropriate action for the nurse to take?

Withhold the drug and recheck the MAR with the health care provider’s order sheet.

Explain that the health care provider probably changed the drug today to something more effective and administer it.

Administer the medication, but make a mental note to check on it later.

Describe the action of the red tablet to the client and administer it.