White blood cells are made in lymph nodes is wrong about the immune system.
Option D
Explanation:
White blood cells are made from the hematopoietic progenitor cells inside the bone marrow after that they are transferred through the blood circulation and seeps out along with the lymph into the lymph nodes. Inside the lymph nodes the white blood cells are exposed to the foreign antigens or toxic proteins from which they get their specificity and antigenic maturity. White blood cells like B cells are present in bone marrow while T cells are present in thymus and moved to the lymph node for maturation.
