A Blood is a type of fluid tissue.
R Blood has erythrocytes, Leucocytes, thormbocytes and plasma.

Options

A. If both As and R are correct and R is correct explanation of As
B. If both As and R are correct but R is not correct explanation of As
C. If As is correct, R is wrong
D. If both As and R are wrong.

Answer

### Step-by-Step Solution:

1. **Understanding the Assertion**: The assertion states that "Blood is a type of fluid tissue."
- **Explanation**: This statement is true. Blood is classified as a connective tissue that is fluid in nature, and it plays a crucial role in the body.

2. **Understanding the Reason**: The reason provided is that "Blood has erythrocytes, leukocytes, thrombocytes, and plasma."
- **Explanation**: This statement is also true. Blood is composed of various components:
- **Erythrocytes (Red Blood Cells)**: These cells are responsible for transporting oxygen throughout the body.
- **Leukocytes (White Blood Cells)**: These cells are part of the immune system and help defend the body against infections.
- **Thrombocytes (Platelets)**: These are involved in blood clotting, which prevents excessive bleeding.
- **Plasma**: This is the liquid component of blood that carries cells, nutrients, hormones, and waste products.

3. **Connecting the Assertion and Reason**: Now, we need to determine if the reason is a correct explanation for the assertion.
- **Explanation**: The reason explains the composition of blood, which directly relates to its classification as a fluid tissue. The components (erythrocytes, leukocytes, thrombocytes, and plasma) are essential for the functions of blood, such as transportation of nutrients and waste.

4. **Conclusion**: Since both the assertion and reason are true, and the reason correctly explains the assertion, we conclude that:
- **Final Answer**: Both assertion and reason are correct, and the reason is the correct explanation of the assertion.