Bone forming cells are

Options

A. osteoblasts
B. osteoclasts
C. chondroblasts
D. chondroclasts

Explanation

To answer the question "Bone forming cells are," we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks for the type of cells responsible for forming bones.

2. **Identify the Options**: The options provided are:
- a) Osteoblast
- b) Osteoclast
- c) Chondroblast
- d) Chondrocyte

3. **Define Each Option**:
- **Osteoblast**: These are the cells that are responsible for bone formation. They synthesize and secrete the bone matrix.
- **Osteoclast**: These cells are involved in the resorption of bone tissue, meaning they break down old bone.
- **Chondroblast**: These are immature cells that form cartilage and synthesize the extracellular matrix of cartilage.
- **Chondrocyte**: These are mature cartilage cells that maintain the cartilage matrix.

4. **Analyze the Functions**:
- Since the question specifically asks for bone-forming cells, we need to focus on the function of each cell type. Osteoblasts are the only cells that are directly involved in the formation of bone.

5. **Select the Correct Answer**: Based on the analysis, the correct answer is **a) Osteoblast**.

### Final Answer:
The bone forming cells are **Osteoblasts**.

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