Correct Answer: A

Rationale: The correct answer is A: Administer an antiemetic. Chemotherapy commonly causes nausea and vomiting as adverse effects. Antiemetics are medications specifically used to prevent or treat these symptoms. Choices B, C, and D are incorrect because administering an antimetabolite, a tumor antibiotic, or an anticoagulant would not directly address the most common adverse effects of chemotherapy, which are nausea and vomiting.

Correct Answer: B

Rationale: Radiation-induced fatigue can last for months; it's important to normalize this for the client.

Correct Answer: A

Rationale: The correct answer is A: Administer antiemetics 30 minutes before chemotherapy. Administering antiemetics before chemotherapy is crucial to prevent nausea rather than treating it after it occurs. This proactive approach helps in minimizing the side effects. Choice B, offering small, frequent meals, can be beneficial but is not the first intervention for severe nausea and vomiting. Choice C, encouraging rest after meals, may help but is not the priority when the client is experiencing severe symptoms. Choice D, instructing the client to use relaxation techniques, is not the first-line intervention for severe nausea and vomiting in a client receiving chemotherapy.

Correct Answer: A

Rationale: Corrected Rationale: Impaired nutritional status is a potential adverse effect of radiotherapy to the head and neck due to alterations in oral mucosa and taste. While cognitive changes, diarrhea, and alopecia can be side effects of other treatments or conditions, they are not typically associated with external radiation for a malignant tumor of the neck. Therefore, the nurse should primarily focus on discussing the risk of impaired nutritional status with the patient.

Correct Answer: C

Rationale: The correct answer is C: 'Back pain.' Back pain is a common symptom of spinal cord compression in cancer patients. This condition can cause localized or radiating back pain due to the compression of the spinal cord or nerves. While symptoms such as decreased deep tendon reflexes, severe headache, and loss of bladder control can occur in other conditions, back pain is specifically associated with spinal cord compression in cancer patients.