<prompt> Which of the following is a secondary lymphoid organ?LiverSpleenBone marrowThymus  <response>: Generative Central Lymphoid Organs Thymus: Site of development of T cells Bone marrow: Site of maturation of B lymphocytes Secondary Peripheral Lymphoid Organs in which adaptive immune responses to microbes are initiated Lymph nodes Spleen Mucosal Cutaneous lymphoid tissues 