Which of the following is a nonsteroidal anti-inflammatory drug (NSAID)?

Correct Answer: A

Rationale: Step-by-step rationale: 1. Diclofenac is a NSAID commonly used for pain relief and inflammation. 2. NSAIDs inhibit the enzyme cyclooxygenase, reducing inflammation. 3. Celecoxib is a selective NSAID, but not the only true NSAID. 4. Methotrexate is an immunosuppressant used for autoimmune diseases. 5. Leflunomide is a disease-modifying antirheumatic drug (DMARD), not an NSAID. Summary: Diclofenac is the correct answer as it is a traditional NSAID that inhibits cyclooxygenase. Celecoxib is a selective NSAID, while Methotrexate and Leflunomide are not categorized as NSAIDs but serve different purposes in treatment.

Correct Answer: D

Rationale: The correct answer is D: Retinal damage. Xanthine oxidase inhibitors like allopurinol can lead to retinal damage, causing vision problems. This is due to the drug's potential to accumulate in the retina. Bone marrow suppression, nausea, and vomiting are not common side effects of xanthine oxidase inhibitors, making them incorrect choices.

Correct Answer: B

Rationale: The correct answer is B because correctly identifying the client prior to a blood transfusion helps prevent a type II hypersensitivity reaction by ensuring compatibility between the donor and recipient blood types. This prevents the recipient's immune system from attacking the transfused blood, which can lead to a reaction. Administering steroids for a positive TB test (choice A) is unrelated to preventing type II hypersensitivity reactions. Keeping the client free of the offending agent (choice C) is more relevant to preventing type IV hypersensitivity reactions. Providing a latex-free environment for the client (choice D) is important for preventing latex allergies, a type I hypersensitivity reaction, not type II.

Correct Answer: C

Rationale: The correct answer is C: Bone marrow infiltration. When the bone marrow is infiltrated by tumors or other abnormal cells, it impairs the production and release of erythropoietin, leading to decreased erythropoietin response and subsequent anemia. Hypothyroidism (choice A) does not directly affect erythropoietin levels. Myelofibrosis (choice B) is associated with increased erythropoietin levels due to ineffective erythropoiesis. Thalassemia (choice D) is a genetic disorder affecting hemoglobin production, but it does not directly impact erythropoietin response.

Correct Answer: A

Rationale: The correct answer is A: Thymus. The thymus is considered a primary lymphoid tissue because it is where T cells mature and differentiate. It plays a crucial role in the development of the immune system. The other choices, B: Spleen, C: Lymph node, and D: Liver, are considered secondary lymphoid tissues where immune responses take place but not where lymphocytes mature.