55.All of the following are secondary Lymphoid organs except- A. Thymus B. Spleen C. MALT D. Lymph nodes
Option A Secondary lymphoid organs (SLOs) include lymph nodes (LNs), spleen, Peyer’s patches (PPs) and mucosal tissues- the nasal associated lymphoid tissue (NALT), adenoids, and tonsils. Less discretely anatomically defined cellular accumulations include the bronchus associated lymphoid tissue (BALT), cryptopatches, and isolated lymphoid follicles (ILFs).
