Largest lymphoid organ of body is `:-`

Options

A. Liver
B. Kidney
C. Spleen
D. Pancreas

Answer

### Step-by-Step Solution:

1. **Identify the Types of Lymphoid Organs**:
- Lymphoid organs are categorized into two types: primary lymphoid organs and secondary lymphoid organs.
- Primary lymphoid organs include the bone marrow and the thymus, where T lymphocytes mature and proliferate.

2. **Understand the Function of Primary Lymphoid Organs**:
- The primary lymphoid organs are responsible for the development and maturation of T lymphocytes, which are crucial for the immune response.

3. **Identify Secondary Lymphoid Organs**:
- After maturation, T lymphocytes migrate to secondary lymphoid organs which include the spleen, lymph nodes, tonsils, and Peyer's patches.
- These organs are where lymphocytes interact with antigens.

4. **Determine the Largest Lymphoid Organ**:
- Among all lymphoid organs, the spleen is identified as the largest lymphoid organ in the body.
- It plays a significant role in filtering blood and managing the immune response.

5. **Eliminate Incorrect Options**:
- The pancreas, kidney, and liver are not lymphoid organs. The pancreas is an exocrine and endocrine organ, the kidney is an excretory organ, and the liver is primarily involved in metabolism and detoxification.

6. **Conclude with the Correct Answer**:
- Therefore, the correct answer to the question "Largest lymphoid organ of the body is" is the **spleen**.