## Core Concept
The question targets the identification of cells responsible for bone resorption. Bone resorption is a critical process in bone remodeling, involving the breakdown and removal of bone tissue. This process is essential for calcium and phosphate homeostasis, bone repair, and maintaining bone health.

## Why the Correct Answer is Right
The correct answer, **C. Osteoclasts**, is right because osteoclasts are the bone cells responsible for the dissolution and resorption of bone tissue. They are large multinucleated cells that play a critical role in bone remodeling by releasing acids and enzymes that break down the hydroxyapatite and organic matrix of bone. This process allows for the release of calcium and phosphate into the bloodstream.

## Why Each Wrong Option is Incorrect
- **Option A:** Osteoblasts are involved in bone formation, not resorption. They produce the organic bone matrix and mineralize it.
- **Option B:** Osteocytes are mature osteoblasts that have become embedded within the bone matrix. They are thought to play a role in mechanosensing and the regulation of bone remodeling but are not primarily involved in bone resorption.
- **Option D:** Chondrocytes are cartilage cells found in healthy cartilage. They are not directly involved in bone resorption but rather in the formation and maintenance of cartilaginous matrix.

## Clinical Pearl / High-Yield Fact
A key point to remember is that osteoclasts are derived from hematopoietic stem cells, specifically from the monocyte/macrophage lineage, and their activity is regulated by the RANK/RANKL/OPG signaling pathway. Imbalances in this pathway can lead to bone diseases such as osteoporosis or Paget's disease.

## Correct Answer: C. Osteoclasts