Given below are some human organs. Identify one primary and one secondary lymphoid organs: Liver, Thymus, Stomach, Thyroid, Tonsils.

Explanation

To solve the question of identifying one primary and one secondary lymphoid organ from the given options, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Types of Lymphoid Organs**:
- Lymphoid organs are classified into primary and secondary lymphoid organs.
- **Primary lymphoid organs** are where lymphocytes (a type of white blood cell) are formed and mature. The main primary lymphoid organs are the bone marrow and the thymus.
- **Secondary lymphoid organs** are where lymphocytes are activated and proliferate. These include the lymph nodes, spleen, and tonsils.
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