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: Pediatrics
All of the following are good prognostic factors for childhood. All 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: Pre B cell ALL has poor prognosis.