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': 'Which of the following anticancer drugs acts by hypomeyhylation \nSelect and explain. \nA. Gemcitabine, B. 5-FU, C. Decitabine, D. Homoharringotonine', 'role': 'user'}, {'content': 'Answer: C \nExplanation: DNA hypomeyhylating agents are used in the treatment of myelodyplastic syndromes The agents in this group include Azacytidine Decitabine Refer Harrison 17th/671', 'role': 'assistant'}]