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
Good prognostic Factors for ALL include all of the following, Except: 
Select and explain. 
A. Hyperdiploidy, B. Female sex, C. Pre B cell ALL, D. t (12 : 21) translocation
C: Pre B cell ALL
Answer: C: Pre B cell ALL 
Explanation: Answer is C (Pre B cell ALL) Hyperdiploidy, Female sex and translocation t (12, 21) are associated with good prognosis. Pre B cell ALL may be associated with a poor prognosis and is the single answer of exclusion.