Correct Answer: A

Rationale: Before initiating Calcitonin-salmon, a skin test for allergy to the medication may be performed to prevent anaphylactic reactions. Allergic reactions can occur due to sensitivities to the drug, particularly in individuals with fish allergies. Therefore, it is essential for healthcare providers to assess the client's potential allergic response to Calcitonin-salmon through a skin test.

Correct Answer: B

Rationale: Carboplatin is known to cause ototoxicity as a serious adverse effect. It is essential for the nurse to monitor the client for any signs or symptoms of hearing loss or other auditory issues to address them promptly.

Correct Answer: A

Rationale: Metformin should be taken with meals to reduce gastrointestinal side effects and to ensure better absorption.

Correct Answer: A

Rationale: Hydralazine is a vasodilator that can cause reflex tachycardia as an adverse effect. The client should monitor their pulse and report any significant increases, as tachycardia can indicate a severe adverse reaction to the medication.

Correct Answer: A

Rationale: Metformin should be taken with meals to reduce gastrointestinal side effects and ensure better absorption. By taking the medication with the first bite of food, the client can help minimize potential stomach upset and improve the drug's effectiveness.