Final answer:
The white pulp consists of T cells, B cells, and macrophages, which are all crucial to the spleen's role in the adaptive immune response.
Step-by-step explanation:
The components of the white pulp in the spleen include a) T cells, b) B cells, and c) Macrophages. Therefore, the answer to the question about the components of the white pulp is d) All of the above. The white pulp is a critical part of the spleen where the immune response takes place; it is heavily involved in the adaptive immune system. T cells and B cells within the white pulp are responsible for the immune response against specific antigens, while macrophages are involved in phagocytosis, which is the process of engulfing and digesting pathogens. The adaptive immune system relies heavily on these components to fight off infections and other foreign invaders in the body.