Which term refers to an acquired unresponsiveness to a specific antig a. chemotherapy b. allergy c. tolerance d. acquired immunity

The correct answer is c. tolerance.<br /><br />Tolerance refers to an acquired unresponsiveness to a specific antigen. It occurs when the immune system becomes less responsive to a particular antigen, leading to a reduced immune response. This can happen due to repeated exposure to the antigen or other factors that modulate the immune response.