Which one of the following is not a disorder of bone ?

Options

A. Arthritis
B. Osteoporosis
C. Rickets
D. Atherosclerosis

Explanation

To determine which of the following is not a disorder of bone, we will analyze each option provided:

1. **Arthritis**: This is a condition that affects the joints and can involve inflammation of the bones at the joints. It is considered a disorder related to bone health.

2. **Osteoporosis**: This is a bone disorder characterized by decreased bone density, leading to an increased risk of fractures. It directly affects the bones and is classified as a bone disorder.

3. **Rickets**: This is a bone disorder that occurs in children due to a deficiency of vitamin D, calcium, or phosphate, leading to softening and weakening of the bones.

4. **Arteriosclerosis**: This is a condition that involves the thickening and hardening of the arterial walls, primarily affecting the cardiovascular system rather than the bones.

Based on this analysis, the correct answer is that **arteriosclerosis** is not a disorder of bone.

### Step-by-Step Solution:
1. **Identify the disorders listed**: Look at the options provided: arthritis, osteoporosis, rickets, and arteriosclerosis.
2. **Analyze each option**:
- **Arthritis**: Affects joints and involves bones.
- **Osteoporosis**: Directly affects bone density and strength.
- **Rickets**: Affects bone development in children.
- **Arteriosclerosis**: Affects arteries, not bones.
3. **Determine which is not a bone disorder**: From the analysis, arteriosclerosis does not relate to bone health.
4. **Conclude the answer**: The answer is arteriosclerosis.