T cells and B cells are the types of lymphocytes. thus, option A and B is correct.
What are lymphocytes?
White blood cells called lymphocytes are a subset of the immune system. They are killer cells that the body naturally produces to combat antigens.
B cells and T cells are the two primary subtypes of lymphocytes. To combat foreign germs, viruses, and poisons, the B cells create antibodies.
T cells are immune system cells that concentrate on particular foreign substances. T cells circulate until they come across their specific antigen, rather than attacking all antigens in general. T cells thus contribute significantly to immunity to foreign toxins.
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