<prompt> Which is concerned with cell mediated immunity?B - LymphocytesT - LymphocytesEosinophilsMonocytes  <response>: Ans. is b i.e., T - Lymphocytes Ref: Ananthanarayan, 9the, p. 152 Cellular Cell mediated immunity - T lymphocytes - defense against intracellular microbes. Humoral immunity - B lymphocytes produces antibodies and convert into plasma cell which are responsible of immunogenic memory defense against extracellular microbes and their toxins. 