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: Medicine
[{'content': 'A patient, on treatment for leukemia, develops chest pain, pulmonary infiltrates and pleural effusion.The cause is - \nSelect and explain. \nA. Daunorubicin, B. Hydroxyurea, C. Cytarabine, D. Tretinoin', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]