**Core Concept**
Multiple myeloma is a type of blood cancer characterized by the proliferation of malignant plasma cells in the bone marrow. It leads to various clinical manifestations due to bone destruction, immunodeficiency, and other systemic effects.

**Why the Correct Answer is Right**
The correct answer is based on the understanding of multiple myeloma pathophysiology. Multiple myeloma is often associated with hypercalcemia, anemia, bone pain, and renal impairment due to the production of lytic lesions and paraproteins. The disease also leads to immunodeficiency, manifesting as recurrent infections.

**Why Each Wrong Option is Incorrect**
**Option A:** Hypercalcemia is a feature of multiple myeloma, primarily due to the release of calcium from bone destruction and increased osteoclast activity.
**Option B:** Anemia is a common finding in multiple myeloma, resulting from the replacement of normal bone marrow by malignant plasma cells.
**Option C:** Bone pain is a hallmark symptom of multiple myeloma, caused by bone destruction and the release of inflammatory mediators.

**Clinical Pearl / High-Yield Fact**
A characteristic feature of multiple myeloma is the presence of monoclonal gammopathy, which can be detected by serum protein electrophoresis (SPEP) or urine protein electrophoresis (UPEP). This finding is crucial for the diagnosis and monitoring of the disease.

**Correct Answer:** D