Correct Answer: A

Rationale: The correct answer is A, Hypercalcemia. In multiple myeloma, bone destruction can lead to the release of calcium from the bones into the bloodstream, causing hypercalcemia. This imbalance is commonly seen in patients with multiple myeloma. Choice B, Hyperproteinemia, is not typically associated with bone destruction in multiple myeloma. Choice C, Elevated serum viscosity, and Choice D, Elevated RBC count, are not directly related to the bone destruction seen in multiple myeloma.

Correct Answer: C

Rationale: The correct answer is C: Muscle weakness. In patients with multiple myeloma who have developed hypercalcemia, monitoring for muscle weakness is crucial. Hypercalcemia can lead to muscle weakness due to its effects on neuromuscular function. Choice A, increased heart rate, is more commonly associated with conditions like dehydration or anxiety rather than hypercalcemia. Choice B, decreased urine output, is commonly seen in conditions leading to acute kidney injury rather than hypercalcemia. Choice D, hypertension, is not a typical symptom of hypercalcemia and is more commonly associated with other conditions like uncontrolled high blood pressure.

Correct Answer: A

Rationale: The correct action by the nurse is to assess the client's blood pressure and pulse. Difficulty breathing can be a sign of various conditions, including cardiac issues. Assessing blood pressure and pulse helps in determining the client's hemodynamic status and identifying any cardiovascular compromise. Option B is less crucial as attaching the client to a pulse oximeter may provide oxygen saturation levels but does not directly assess cardiac output. Option C is not the priority in this situation as the client's difficulty breathing is a more urgent concern. Option D is incorrect as urgent radiation therapy is not indicated based on the client's presentation.

Correct Answer: A

Rationale: The correct answer is A, Hypercalcemia. In multiple myeloma, bone destruction can lead to the release of calcium from the bones into the bloodstream, causing hypercalcemia. This imbalance is commonly seen in patients with multiple myeloma. Choice B, Hyperproteinemia, is not typically associated with bone destruction in multiple myeloma. Choice C, Elevated serum viscosity, and Choice D, Elevated RBC count, are not directly related to the bone destruction seen in multiple myeloma.

Correct Answer: D

Rationale: The correct answer is D: Invading healthy host tissues. Invasion is the process where malignant cells grow into surrounding healthy tissues, allowing the cancer to spread to other parts of the body. Choices A, B, and C are incorrect. Adhering to primary tumor cells does not involve the transfer of cells to other locations, inducing mutation of cells of another organ is not a mechanism of cell transfer, and phagocytizing healthy cells refers to the process of engulfing and digesting cells, which is not a method of cancer cell transfer.