Which of the Following is Not a Lymphoid Organ

Question

Which of the following is not a lymphoid organ?
A) the spleen
B) the thymus
C) the thyroid
D) the tonsils

Accepted Answer

The thyroid is not a lymphoid organ as it is responsible for the production of hormones which regulate metabolism. The spleen, thymus, and tonsils are all lymphoid organs involved in the immune system.