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
Di Guglielmo's disease refers to which of the following conditions? 
Select and explain. 
A. Megakaryoblastic leukemia, B. Erythroleukemia, C. Monocytic leukemia, D. Myelomonocytic leukemia
B: Erythroleukemia
Answer: B: Erythroleukemia 
Explanation: According to the French-American-British (FAB) Classification of AML di Guglielmo's disease refers to M6 variety: Erythroleukemia. Ref:Harrisons Principles of Internal Medicine, 18th Edition, Page 906