Outer covering of cartilage is known as:

Options

A. perichondrium
B. periosteum
C. endosteum
D. peritoneum

Explanation

To answer the question "Outer covering of cartilage is known as:", we will analyze each option provided and identify the correct term.

### Step-by-Step Solution:

1. **Identify the Options**: The options given are:
- A) Perichondrium
- B) Periosteum
- C) Endosteum
- D) Peritoneum

2. **Analyze Option A - Perichondrium**:
- The perichondrium is known as the outer covering of cartilage. It consists of dense connective tissue that surrounds the cartilage, providing support and nourishment.
- **Conclusion**: This option is likely correct.

3. **Analyze Option B - Periosteum**:
- The periosteum is the outer covering of bones, not cartilage. It serves a similar function to the perichondrium but is specific to bone tissue.
- **Conclusion**: This option is incorrect.

4. **Analyze Option C - Endosteum**:
- The endosteum is the inner lining of bones, which lines the medullary cavity. It does not pertain to cartilage.
- **Conclusion**: This option is incorrect.

5. **Analyze Option D - Peritoneum**:
- The peritoneum is the membrane lining the abdominal cavity and covering the abdominal organs. It is not related to cartilage.
- **Conclusion**: This option is incorrect.

6. **Final Answer**: Based on the analysis, the outer covering of cartilage is known as **Perichondrium** (Option A).