Assertion : The cells of connective tissues except blood secrete fibres
Reason : Fibres provide strength, elasticity and flexibility to the tissue

Options

A. If both assertion and reason are true and reason is the correct explanation of assertion
B. If both assertion and reason are true but reason is not the correct explanation of assertion
C. If assertion is true but reason is false
D. If both assertion and reason are false

Explanation

**Step-by-Step Solution:**

1. **Understanding the Assertion**: The assertion states that the cells of connective tissues, except for blood, secrete fibers. This is true as connective tissues are characterized by the presence of cells that produce extracellular matrix components, including fibers.

2. **Identifying Connective Tissue Types**: There are various types of connective tissues:
- **Loose Connective Tissue**: This includes adipose tissue, which contains fibroblast cells that secrete fibers.
- **Dense Connective Tissue**: This includes tendons and ligaments, which also have fibroblast cells that secrete fibers.
- **Fluid Connective Tissue**: Blood is an example of fluid connective tissue, but it does not have fibroblast cells and therefore does not secrete fibers.

3. **Understanding the Role of Fibers**: The reason states that fibers provide strength, elasticity, and flexibility to the tissue. This is also true. Fibers such as collagen provide tensile strength, while elastin contributes to elasticity and flexibility.

4. **Evaluating the Relationship**: While both the assertion and reason are true statements, the reason does not directly explain the assertion. The assertion is about the secretion of fibers by connective tissue cells, while the reason discusses the function of these fibers.

5. **Conclusion**: Therefore, the correct evaluation is that both the assertion and reason are true, but the reason is not the correct explanation for the assertion.

**Final Answer**: Both assertion and reason are true, but the reason is not the correct explanation for the assertion.

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