This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anti-Cancer, Subject name: Pharmacology
[{'content': 'Methotrexate toxicity is prevented by giving? \nSelect and explain. \nA. Folic acid, B. Folinic add, C. Citric acid, D. Glucaric acid', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Folinic acid * Folinic acidFor preventing methotrexate toxicity* AllopurinolTo prevent hyperuricemia caused by rapid destruction of cells during cancer chemotherapy.* Lithium carbonateIt has stimulant effect on bone marrow, so used during myelosuppresive drug therapy.* OndensetronFor controlling cytotoxic drug induced vomiting.* MesnaFor prevention of cyclophosphamide/ formamide indused hemorrhagic cystitis", 'role': 'assistant'}]