This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Chemotherapy, Subject name: Pharmacology
[{'content': 'Citrovorum factor is given along with all the following drugs except \nSelect and explain. \nA. Methotrexate, B. Pemetrexed, C. Pyrimethamine, D. Cytosine arabinoside', 'role': 'user'}, {'content': 'Answer: D \nExplanation: 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', 'role': 'assistant'}]