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: Pathology
"Colon Carcinogenesis" is associated with all except: 
Select and explain. 
A. APC, B. k RAS, C. B-catenin, D. Mismatch repair
D: Mismatch repair
Answer: D: Mismatch repair 
Explanation: Mismatch repair