Correct Answer: C

Rationale: After administering a narcotic medication, any unused portion should be discarded with another nurse as a witness. This procedure ensures proper disposal of controlled substances and prevents misuse or diversion. Storing it for later use (Choice B) is not appropriate due to safety concerns and legal regulations. Returning it to the pharmacy (Choice D) is also not recommended as the medication is already out of the pharmacy's control. Documenting the amount wasted (Choice A) is important for accurate record-keeping but does not address the immediate need for safe disposal of the unused narcotic medication.

Correct Answer: B

Rationale: The correct answer is to increase fluid intake to 2 liters per day. Adequate fluid intake helps manage hypertension and prevent fluid retention. Limiting sodium intake, avoiding potassium-rich foods, and abstaining from alcohol are important aspects of managing hypertension; however, in this scenario, emphasizing the increase in fluid intake is crucial for the client's understanding and compliance.

Correct Answer: D

Rationale: The correct answer is D: Chronic conditions. Chronic conditions, such as diabetes or immune suppression, can compromise the immune system, making individuals more susceptible to infections. Frequent handwashing (Choice A) is actually a protective measure against infections. Increased mobility (Choice B) and high blood pressure (Choice C) are not directly associated with an increased risk for infections.

Correct Answer: C

Rationale: Maintaining the bed in the lowest position is an appropriate action when caring for a client with dementia who tries to get out of bed. This helps reduce the risk of falls and ensures the client's safety. Turning off the bed alarm (Choice A) is not advisable as it can be a safety measure to alert the staff when the client tries to get out of bed. Using physical restraints (Choice B) and applying a vest restraint (Choice D) should be avoided as they can lead to physical and psychological harm, reduce mobility, and compromise the client's dignity.

Correct Answer: A

Rationale: The correct instruction the nurse should include to improve oxygenation for a client with COPD is to 'Use pursed-lip breathing during activities.' Pursed-lip breathing helps improve oxygenation by slowing down the respiratory rate, reducing the work of breathing, and keeping the airways open. This technique also helps prevent the collapse of small airways during exhalation, allowing for more complete emptying of the lungs. Choices B, C, and D are incorrect because deep breathing exercises after meals, diaphragmatic breathing during exercise, and breathing in short, shallow breaths do not specifically target the improvement of oxygenation in individuals with COPD.