This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cytotoxic Anticancer Drugs, Subject name: Pharmacology
Arsenic compounds are used for the treatment of which of the following cancer? 
Select and explain. 
A. APML, B. CLL, C. ALL, D. CML
A: APML
Answer: A: APML 
Explanation: ARSENIC TRIOXIDE It is used for the treatment of Acute Promyelocytic Leukemia (APML). It may cause hyperglycemia and prolonged QT interval. Like tretinoin, it also acts as a differentiating agent.