This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
[{'content': 'Azathioprine is used as \nSelect and explain. \nA. Immunosuppressant, B. Antigout drug, C. Anti-retro virus, D. Anti- cancer', 'role': 'user'}, {'content': 'Answer: A \nExplanation: CompoundUseNucleoside analogueBromodeoxyuridineaStudy cell proliferationThymidine analogueAllopurinalAnti gout drugHypoxanthine analogueAzathiopineImmunosuppressantPurine analogue', 'role': 'assistant'}]