Final answer:
D) Plasma T-lymphocyte is not a type of T-lymphocyte. Different T-lymphocytes such as Helper, Cytotoxic, Memory, and Suppressor T-lymphocytes have specific roles in the immune system, while plasma cells are actually differentiated B cells that produce antibodies.
Step-by-step explanation:
The type of T-lymphocyte that is not recognized in scientific literature is "Plasma T-lymphocyte". The different types of T-lymphocytes include Helper T-lymphocytes (Th cells), which assist in the immune response by activating other immune cells; Cytotoxic T-lymphocytes (Tc cells), which destroy virus-infected or cancerous cells; Memory T-lymphocytes, which provide a faster and stronger immune response upon re-encountering the same antigen; and Suppressor T-lymphocytes, also known as regulatory T cells, which regulate the immune response to avoid overactivity. Plasma cells, however, are differentiated B cells that produce antibodies, not T cells.