This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Large intestine, Subject name: Surgery
All of the following genes may be involved in development of carcinoma of colon except: 
Select and explain. 
A. APC, B. Beta-Catenin, C. K-ras, D. Mismatch repair genes
B: Beta-Catenin
Answer: B: Beta-Catenin 
Explanation: Gene Mutations that Cause Colon Cancer Mutation type Genes Involved Germline APC and MMR Somatic Oncogenes: Myc, Ras, Src, erbB2 Tumor suppressor genes: p53, DCC, APC MMR genes : bMSH2, bMLH1, bPMS1, bPMS2, bMSH6, bMSH3 Genetic polymorphism APC