Select the incorrect option regarding the lymphoid organs labelled as P , $Q, R$ and $S$ in the diag

Question

Select the incorrect option regarding the lymphoid organs labelled as P , $Q, R$ and $S$ in the diagram of human lymphatic system.\

Professor PC Thomas Classes · Answer

(b) : In the given diagram, 'P'-Lymph nodes, 'Q'-Thymus, ' $R$ '-Spleen, 'S'-Bone marrow. Thymus and bone marrow are the primary lymphoid organs where maturation of T-cells and B-cells take place respectively. Lymph nodes and spleen are the secondary lymphoid organs where T-cells and B-cells undergo proliferation and differentiation.