The organs of the lymphatic system such as lymph nodes, the thymus, and the spleen are also part of the immune system. So, the correct option is A.
What do you mean by the Lymphatic system?
The lymphatic system may be defined as a complex network of vessels, nodes, and tissues that synthesizes white blood cells to fight against infections and diseases.
Spleen and Lymph nodes are categorized under secondary lymphoid organ of the immune system, while the thymus is categorized under the primary lymphoid organ of the immune system.
Therefore, the correct option for this question is A.
To learn more about the Immune system, refer to the link:
https://brainly.com/question/234802
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