Pharmacology General bc16ab10 Methotrexate is used in high doses in - A Osteosarcoma B Retinoblastoma C Rhabdomyosarcoma D Ewig's sarcoma High-Yield Explanation Ans. is 'a' i.e., Osteosarcoma o High dose methotrexate with leucoverin is indicated for chemotherapy in osteosarcoma.