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: Pharmacology
[{'content': 'All–trans–retinoic acid is used in the treatment of: \nSelect and explain. \nA. Acute promyelocytic leukemia, B. A.L.L., C. CML, D. Transient myeloproliferative disorder', 'role': 'user'}, {'content': 'Answer: A \nExplanation: All-trans-retinoic acid is used in the treatment of acute promyelocytic leukemia.\nTreatment of Acute promyelocytic leukemia\n\nUsually, all the cases of AML other than acute promyelocytic leukemia are treated with cytarabine + anthracy\xadcline.\nBut in the case of acute promyelocytic leukemia, tretinoin is used for induction.\nWhen acute promyelocytic leukemia is treated with anthracycline and cytarabine, DIC is induced by the re\xadlease of granule components of dying tumour cells.\nOn the other hand, tretinoin produces a complication known as a retinoic acid syndrome, which occurs in the first 3 weeks of treatment and is characterized by fever, dyspnoea, chest pain, pulmonary infiltrates pleural and pericardial effusions.\nIf the patient is refractory to tretinoin therapy, arsenic trioxide is used.', 'role': 'assistant'}]