After maturation, in primary lymphoid organs, the lymphocytes migrate for interaction with antigens

Question

After maturation, in primary lymphoid organs, the lymphocytes migrate for interaction with antigens to secondary lymphoid organ(s)/tissue(s) like 
A. thymus 
B. bone marrow 
C. spleen 
D. lymph nodes 
E. Peyer's patches 
Choose the correct answer from the options given below:

Professor PC Thomas Classes · Answer

(b) : Lymphoid organs are the organs where origin maturation and proliferation of lymphocytes occur. The primary lymphoid organs are bone marrow and thymus where immature lymphocytes differentiate into antigensensitive lymphocytes. Both bone-marrow and thymus provide micro-environments for the development and maturation of T-lymphocytes. After maturation the lymphocytes migrate to secondary lymphoid organs like spleen, lymph nodes, tonsils and Peyer's patches of small intestine and appendix. The secondary lymphoid organs provide the sites for interaction of lymphocytes with the antigen, which then proliferate to become effector cells.