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
A.M.L. with worst prognosis - 
Select and explain. 
A. 8/21 translocation, B. Inversion 16, C. Normal cytogenetics, D. Monosomy 7
D: Monosomy 7
Answer: D: Monosomy 7 
Explanation: None