Q. Which of the following are secondary lymphoid organs? (a) Bone marrow (b) Tonsils (c) Spleen (d) Thymus Choose the correct answer from the options given below:
A) (a) and (d) only
B) (a) and (b) only
C) (b) and (c) only
D) (b) and (d) only
Explanation
[Solution from source] Bone marrow and thymus are primary lymphoid organs. Tonsils, spleen, lymph nodes, Peyer's patches and MALT are secondary lymphoid organs. Answer (3).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.