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
Bad prognosis in AML is indicated by - 
Select and explain. 
A. Monosomy, B. Deletion of X or Y chromosome, C. T(8:21), D. Nucleophosmin mutation
A: Monosomy
Answer: A: Monosomy 
Explanation: None