Correct Answer: C

Rationale: Primary prevention involves actions taken to reduce the risk of developing cancer by preventing exposure to known risk factors or promoting healthy behaviors. Teaching patients to wear sunscreen is an example of primary prevention because it aims to reduce the risk of skin cancer by minimizing exposure to harmful ultraviolet (UV) radiation from the sun. Encouraging protective measures such as wearing sunscreen, avoiding tanning beds, and wearing protective clothing are all steps to prevent skin cancer before it develops.

Correct Answer: B

Rationale: Difficulty swallowing (dysphagia) following radiation therapy to the neck area is a significant concern because it can indicate serious complications such as esophageal stricture, inflammation, or damage to the surrounding tissues, including the esophagus. This can lead to malnutrition, dehydration, or aspiration, all of which require prompt intervention. Radiation therapy can cause irritation and scarring in the esophageal and throat tissues, which may progressively worsen if not treated. Therefore, dysphagia should be addressed immediately to prevent further complications.

Correct Answer: B

Rationale: Nausea and vomiting are among the most common and distressing side effects of chemotherapy. Chemotherapy drugs target rapidly dividing cells, including cancer cells, but they also affect healthy cells in the gastrointestinal (GI) tract, triggering the release of chemicals that stimulate the brain's vomiting center. These side effects can occur immediately (acute), be delayed, or even anticipatory, and often require management with antiemetic (anti-nausea) medications to improve the patient's comfort and quality of life during treatment.

Correct Answer: D

Rationale: A pelvic ultrasound requires the client to have a full bladder because the bladder acts as a window through which pelvic organs, such as the uterus and ovaries, can be visualized more clearly. The full bladder pushes the intestines out of the way and provides a better acoustic pathway for the ultrasound waves. Without this, the pelvic organs might be obscured, and the images would be less accurate.

Correct Answer: B

Rationale: For patients undergoing consolidation therapy for leukemia, severe fatigue is a common side effect of treatment due to factors such as anemia, decreased nutritional intake, and the body's response to chemotherapy. While exercise is beneficial, the patient's fatigue may limit their ability to engage in strenuous activity. Assisting the patient to sit in a chair during awake times is a practical way to encourage some physical activity while respecting their fatigue levels. This intervention helps prevent complications associated with immobility, such as muscle atrophy and venous stasis, without overwhelming the patient. It allows the patient to engage in light activity that is manageable and promotes recovery.