**Core Concept**
Osteosarcoma is the most common primary bone tumor and arises from osteoblasts. It is not a soft tissue sarcoma but is often confused with soft tissue sarcomas due to its bone involvement. The question tests understanding of tumor metastasis patterns, particularly which sarcoma commonly spreads to bone.

**Why the Correct Answer is Right**
Osteosarcoma originates in bone and is the most frequent primary bone tumor. While it is classified as a bone tumor rather than a soft tissue sarcoma, it can metastasize to other bones, especially in the lungs and long bones. The question likely contains a misclassification—osteosarcoma is not a soft tissue sarcoma—but it is the only tumor listed that commonly presents with bone metastases. Thus, it is the most appropriate choice in this context.

**Why Each Wrong Option is Incorrect**
Option A: Fibrosarcoma is a soft tissue sarcoma that rarely metastasizes to bone and does not commonly involve bone secondaries.
Option B: Liposarcoma, though a soft tissue sarcoma, metastasizes to the lungs more than bone and has low bone metastatic potential.
Option D: Neurofibroma is a benign tumor of nerve sheath, not a sarcoma, and does not metastasize to bone.

**Clinical Pearl / High-Yield Fact**
Osteosarcoma is the most common primary bone tumor in children and adolescents, and its metastasis to bone is not uncommon—especially in the metaphysis of long bones. Always consider osteosarcoma in young patients with bone pain and lytic lesions.

✓ Correct Answer: C. Osteosarcoma