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
Arsenic is useful in the treatment of : 
Select and explain. 
A. Acute promyelocytic leukemia, B. Myelodysplastic syndrome, C. Transient myeloproliferative disorder, D. All of the above
A: Acute promyelocytic leukemia
Answer: A: Acute promyelocytic leukemia 
Explanation: None