Citrovorum factor is given along with all the following drugs except: (A) Methotrexate, (B) Pemetrexed, (C) Pyrimethamine, (D) Cytosine arabinoside
Answer is D. Citrovorum factor or rescue factor or folinic acid - active form of folic acid is given along with antifolate drugs like Methotrexate, pemetrexed, pyrimethamine, cotrimoxazole, and 5 fluorouracil.Ref: Tripati 6th ed. Pg: 592