This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Haematology, Subject name: Anatomy
Non specific esterase is positive in all categories of AML except: 
Select and explain. 
A. M3, B. M4, C. M5, D. M6
D: M6
Answer: D: M6 
Explanation: NSE is characteristic of M4 and M5 leukemia only.NSE positivity is not characteristic feauture of other subclasses of AML. However NSE positivity may aldo be seen in 15-20 percent of cases of M7 NSE positivity is not a feauture of M0,M1,M2,M6 classes of AML.( ref Robbins 7th/759)