Which of the following is not considered a type of lymphoid cell?

• A. T cells.
• B. B cells.
• C. Platelets.
• D. Macrophages.

Answer: (C)

Verified step by step guidance

1. Understand the types of lymphoid cells: Lymphoid cells are primarily involved in the immune response and include T cells, B cells, and natural killer (NK) cells.
2. Identify the role of T cells: T cells are a type of lymphocyte that play a central role in cell-mediated immunity.
3. Identify the role of B cells: B cells are responsible for producing antibodies and are crucial for humoral immunity.
4. Consider the role of macrophages: Macrophages are not lymphoid cells; they are phagocytes that engulf and digest cellular debris and pathogens.
5. Recognize that platelets are not lymphoid cells: Platelets are involved in blood clotting and are not part of the lymphoid lineage, which is why they are the correct answer to the question.