<prompt> Which of the following drugs is used as an immunosuppressive but lacks anticancer activityMethotrexate6-mercaptopurineAzathioprine5-flurouracil  <response>: Ref-KDT 6e p819,820,838 Azathioprine is an an antimetabolite that is used as an immunosuppressant but not as an antineoplastic drug. It is a product and this conveed to its active metabolite in the Lymphoid Cells only 