The main difference between white and yellow fibre is of

Options

A. Protein
B. Colour of fibre
C. Both 1 & 2
D. None of the above

Answer

### Step-by-Step Solution:

1. **Understanding the Types of Fibers**:
- There are two main types of fibers in connective tissue: white fibers and yellow fibers.

2. **Composition of White Fibers**:
- White fibers are primarily composed of collagen protein. This composition gives them their strength and support characteristics.

3. **Characteristics of White Fibers**:
- White fibers are typically white and shiny in appearance. They are known for their ability to connect various parts of the body and provide structural support.

4. **Composition of Yellow Fibers**:
- Yellow fibers, on the other hand, are made up of elastin protein. This protein allows these fibers to be more flexible and elastic.

5. **Characteristics of Yellow Fibers**:
- Yellow fibers have a yellow color and are responsible for providing elasticity to tissues, allowing organs to stretch and contract.

6. **Comparison of Functions**:
- The main function of white fibers is to provide strength and support, while yellow fibers provide elasticity, enabling organs to stretch and contract.

7. **Conclusion**:
- The main difference between white and yellow fibers lies in both their protein composition (collagen in white fibers and elastin in yellow fibers) and their color (white vs. yellow).

8. **Final Answer**:
- Therefore, the correct answer to the question is **C. one and two both** (referring to both protein and color differences).