Final answer:
The correct action for a nurse caring for a patient with type A hemophilia and a swollen knee is to immobilize the knee joint to prevent further injury and bleeding.
Step-by-step explanation:
The subject of this question is a nurse's care for a patient with type A hemophilia experiencing severe pain and swelling in the knee. In the case of hemophilia, where bleeding into joints is a concern, it's crucial to manage the situation carefully to prevent further damage or complications. Considering this, the appropriate action would be to b. immobilize the knee joint. Immobilizing the joint would help to prevent further injury and bleeding. It is essential to avoid treatments that could exacerbate bleeding, such as applying heat or performing exercises or movements that stress the joint. Non-steroidal anti-inflammatory drugs (NSAIDs) can help manage pain and inflammation but should only be used after bleeding has stopped, as they can interfere with blood clotting.