Which type of lymphocytes are produced from lymphoblasts?

Lymphoblasts are precursor cells that give rise to lymphocytes, which are a critical component of the immune system. The two main types of lymphocytes that develop from lymphoblasts are T cells and B cells.

T cells mature in the thymus and are primarily involved in cell-mediated immunity, including the activation of other immune cells and the direct killing of infected or cancerous cells. B cells, on the other hand, mature in the bone marrow and are responsible for humoral immunity, producing antibodies that target pathogens.

In contrast, red blood cells, which carry oxygen, do not derive from lymphoblasts; they arise from erythroblasts in the bone marrow. Likewise, platelets and leukocytes also have different developmental pathways and are not products of lymphoblasts. Neutrophils and macrophages are types of white blood cells that play roles in innate immunity and are derived from myeloid lineage cells, not lymphoid lineage cells like lymphoblasts.

Thus, the correct answer highlights the specific lineage of lymphocytes as the products of lymphoblasts, underlining their vital roles in adaptive immunity.