Tissue which form the basic structure of lymphoid organs such as spleen is :
(a) Lymphoid tissue
(b) Cartilage tissue
(c) Elastic tissue
(d) Areolar tissue

Options

A. Lymphoid tissue
B. Cartilage tissue
C. Elastic tissue
D. Areolar tissue

Answer

To solve the question regarding which tissue forms the basic structure of lymphoid organs such as the spleen, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks for the type of tissue that forms the basic structure of lymphoid organs, specifically mentioning the spleen.

2. **Identify the Options**: The options provided are:
- (a) Lymphoid tissue
- (b) Cartilage tissue
- (c) Elastic tissue
- (d) Areolar tissue

3. **Define Lymphoid Tissue**: Lymphoid tissue is specialized connective tissue that is primarily involved in the immune response. It contains various types of white blood cells, including lymphocytes (B cells and T cells), which are crucial for the immune system.

4. **Link Lymphoid Tissue to Lymphoid Organs**: The spleen, along with other lymphoid organs such as the thymus and lymph nodes, is composed mainly of lymphoid tissue. This tissue supports the function of these organs in filtering blood and producing immune responses.

5. **Evaluate Other Options**:
- **Cartilage tissue**: This is a type of connective tissue that provides support and flexibility but is not involved in the structure of lymphoid organs.
- **Elastic tissue**: This type of connective tissue allows for stretch and recoil, found in structures like arteries, but not in lymphoid organs.
- **Areolar tissue**: This is a loose connective tissue that supports various organs but does not specifically form the structure of lymphoid organs.

6. **Select the Correct Answer**: Given that lymphoid tissue is specifically designed to form the structure of lymphoid organs like the spleen, the correct answer is (a) Lymphoid tissue.

### Final Answer:
The tissue which forms the basic structure of lymphoid organs such as the spleen is: **(a) Lymphoid tissue**.