<prompt> Which is the most active single chemotherapeutic agent in the treatment of leiomyosarcoma?AdriamycinDaunorubicinMethotrexateCisplatin  <response>: Ans. A AdriamycinRef: KDT 8the p926Doxorubicin adriamycin and daunorubicin are anthracycline derivatives.Daunorubicin is mainly used for hematological malignancies acute leukemia whereas doxorubicin is used for solid tumors and soft tissue sarcomas. 