Correct Answer: C

Rationale: The correct answer is 'C: Sore throat.' Oxygen toxicity can manifest with symptoms like a sore throat, cough, chest pain, difficulty breathing, and fatigue. However, a sore throat can be an early indicator of oxygen toxicity and should prompt immediate attention. Nasal congestion, cough, and fatigue are not specific indicators of oxygen toxicity but could be related to other factors in a client with COPD receiving oxygen therapy.

Correct Answer: B

Rationale: The correct answer is B: Liver function tests. While a client is taking metformin, monitoring liver function tests is crucial to assess for potential hepatic side effects. Metformin is primarily eliminated by the liver, and monitoring liver function tests helps in early detection of any liver-related complications. Choices A, C, and D are incorrect. A complete blood count (CBC) is not specifically required for monitoring metformin therapy. Serum electrolytes are not directly impacted by metformin, making it less relevant for monitoring this medication. Renal function tests are important for some other diabetes medications, but in the case of metformin, liver function tests take precedence due to its hepatic metabolism.

Correct Answer: D

Rationale: The correct answer is D. Purulent drainage around the insertion site of the feeding tube indicates an infection, which requires immediate attention. This may be a sign of a serious complication that needs prompt nursing intervention to prevent further complications or deterioration in the client's condition. Choices A, B, and C do not indicate an immediate threat to the client's health. While option A highlights the infusion rate of the feeding, it does not pose an immediate risk compared to the presence of purulent drainage indicating infection.

Correct Answer: D

Rationale: Choosing option D, 'Try to help your dad enjoy this time as much as he can,' is the most appropriate response by the nurse. This response shows empathy and compassion towards the client and their family during this difficult transition. The focus on supporting the client in enjoying their remaining time reflects a holistic approach to care. Options A, B, and C are not the best responses in this situation. Option A could lead to unnecessary details that might be overwhelming for the family. Option B shifts the responsibility to the social worker without providing immediate support. Option C deflects the son's concerns to another healthcare professional when emotional support is needed.

Correct Answer: A

Rationale: The correct answer is A. Shifting weight to the unaffected leg when descending stairs is crucial for maintaining balance and safety. This technique helps prevent falls and distributes weight appropriately. Choices B, C, and D are incorrect because using crutches to support the weight on the injured leg, leading with the injured leg when ascending stairs, and keeping crutches under the arms are all potentially unsafe practices that could lead to further injury or accidents.