Question

Given below is the diagram of human lymphatic system, where $A$, $B$, $C$ and $D$ are lymphoid organs. Select incorrect option regarding the lymphoid organs labelled as $A$, $B$, $C$ and $D$.

• A. $T$ cells mature in $B$
• B. $B$ and $T$ cells undergo maturation in $C$
• C. $B$ and $T$ cells undergo proliferation and differentiation in $A$
• D. B cells mature in D

Answer 1

Answer: (B)

'$A$'-lymph nodes, '$B$'-Thymus, '$C$'-spleen, '$D$'-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.