Which blood cell type is the most abundant leukocyte and refers to T and B cells?

Which blood cell type is the most abundant leukocyte and refers to T and B cells?

• A. Monocyte
• B. Eosinophil
• C. Lymphocytes
• D. Platelets

Answer: (C)

Lymphocytes are a type of white blood cell central to adaptive immunity. They include two main groups: T cells, which coordinate and execute immune responses, and B cells, which produce antibodies. That’s why this option fits best—the term describes the cells responsible for antigen-specific, targeted immune defense. The other options are different leukocytes: monocytes are phagocytes that become macrophages, eosinophils help fight parasites and participate in allergies, and platelets are not leukocytes at all but cell fragments involved in blood clotting.

Lymphocytes are a type of white blood cell central to adaptive immunity. They include two main groups: T cells, which coordinate and execute immune responses, and B cells, which produce antibodies. That’s why this option fits best—the term describes the cells responsible for antigen-specific, targeted immune defense. The other options are different leukocytes: monocytes are phagocytes that become macrophages, eosinophils help fight parasites and participate in allergies, and platelets are not leukocytes at all but cell fragments involved in blood clotting.