Final answer:
The nurse should contact the provider to clarify the prescription for (option B) diltiazem 30mg PO 3 times/day and hold for apical pulse less than 50 min.
Step-by-step explanation:
The nurse should contact the provider to clarify the prescription for (option B) diltiazem 30mg PO 3 times/day and hold for apical pulse less than 50 min. Diltiazem is a calcium channel blocker used to treat high blood pressure and certain heart conditions. It is important to monitor the client's heart rate when taking diltiazem, and if the apical pulse is less than 50 minutes, the medication should be held and the provider should be contacted for further instructions.