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': 'The following pair of drugs acts as protectors of cancer chemotherapy? \nSelect and explain. \nA. Dexrazoxane and Filgrastim, B. Folinic acid and folic acid, C. Amefostine and Acrolein, D. Magnesium and sargramostim', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Dexrazoxane prevents cardiotoxicity of anticancer antibiotics like doxorubicin by increasing the action of superoxide dismutase-mediated inhibition of free radicles. Filgrastim is used for bone marrow protection and new cell line formation. Ref: HL Sharma 3rded. Pg: 878', 'role': 'assistant'}]