proteoglycan in cartilages , which is part of polysaccharide, is

Options

A. Condriotin
B. Ossein
C. Casein
D. Cartilegen

Answer

To solve the question regarding the proteoglycan in cartilages that is part of polysaccharides, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Proteoglycans**:
- Proteoglycans are large molecules made up of a core protein and glycosaminoglycan (GAG) chains. They are essential components of the extracellular matrix in connective tissues, including cartilage.

2. **Identifying the Components of Proteoglycans**:
- The glycosaminoglycan chains in proteoglycans are often composed of repeating disaccharide units. Common GAGs include chondroitin sulfate, keratan sulfate, and hyaluronic acid.

3. **Analyzing the Options**:
- The question provides several options to identify the correct proteoglycan associated with cartilage:
- **Option A: Chondroitin**: This is a type of GAG that is a major component of cartilage, providing structure and support.
- **Option B: Auxin**: This is a plant hormone and not related to cartilage.
- **Option C: Casein**: This is a protein found in milk and not related to cartilage.
- **Option D: Cartilagin**: This term is not commonly recognized in the context of proteoglycans.

4. **Conclusion**:
- Based on the analysis, the correct answer is **Option A: Chondroitin**, as it is a key component of proteoglycans found in cartilage.

### Final Answer:
The proteoglycan in cartilages that is part of polysaccharide is **Chondroitin**.