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 belo

To understand where lymphocytes migrate after maturation, we must distinguish between primary and secondary lymphoid organs:

1. Primary Lymphoid Organs: These are the organs where immature lymphocytes differentiate and mature into antigen-sensitive lymphocytes. The primary lymphoid organs in humans are the bone marrow (where B lymphocytes mature) and the thymus (where T lymphocytes mature). Therefore, thymus (A) and bone marrow (B) are primary lymphoid organs.
2. Secondary Lymphoid Organs/Tissues: After maturation, lymphocytes migrate via blood and lymph to secondary lymphoid organs. These organs provide the sites for interaction of mature lymphocytes with antigens, which then proliferate to become effector cells. Examples of secondary lymphoid organs and tissues include:
• The spleen (C)
• Lymph nodes (D)
• Tonsils
• Peyer's patches of the small intestine (E)
• Appendix

Based on this classification:
• A (thymus) and B (bone marrow) are primary lymphoid organs.
• C (spleen), D (lymph nodes), and E (Peyer's patches) are secondary lymphoid organs/tissues.

Thus, the secondary lymphoid organs/tissues listed in the options are C, D, and E only.