Select the correctly matched pair

Options

A. chondroblast-matrix secreting cells of cartilage
B. elastic cartilage-in pubic symphysis
C. fibrous cartilage-pinna of ear
D. hyaline cartilage-intervertebral disc

Answer

To solve the question of selecting the correctly matched pair from the given options, we will analyze each option step by step.

### Step-by-Step Solution:

1. **Option 1: Chondroblast - Metric Secreting Cells of Cartilage**
- Chondroblasts are indeed the cells responsible for the secretion of the extracellular matrix in cartilage. They play a crucial role in the formation and maintenance of cartilage tissue.
- **Conclusion**: This pair is correctly matched.

2. **Option 2: Elastic Cartilage - Pubic Symphysis**
- Elastic cartilage is found in structures that require flexibility, such as the outer ear and the epiglottis. The pubic symphysis is a joint between the pubic bones and is made of fibrocartilage, not elastic cartilage.
- **Conclusion**: This pair is incorrectly matched.

3. **Option 3: Fibrous Cartilage - Pinna of Ear**
- The pinna (or auricle) of the ear is made of elastic cartilage, which provides flexibility and shape. Fibrous cartilage is found in areas that require tensile strength, such as intervertebral discs and the pubic symphysis.
- **Conclusion**: This pair is incorrectly matched.

4. **Option 4: Hyaline Cartilage - Intervertebral Disk**
- Hyaline cartilage is a type of cartilage that is found in the respiratory tract, nose, and at the ends of long bones. Intervertebral discs, however, are made of fibrocartilage, which provides support and absorbs shock between vertebrae.
- **Conclusion**: This pair is incorrectly matched.

### Final Answer:
The correctly matched pair is **Option 1: Chondroblast - Metric Secreting Cells of Cartilage**.

---