This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General pathology, Subject name: Pathology
KRAS proto-oncogene is associated with 
Select and explain. 
A. Colon cancer, B. Breast cancer, C. Bladder cancer, D. Melanoma
A: Colon cancer
Answer: A: Colon cancer 
Explanation: RAS Oncogenes Tumours with RAS mutations KRAS - adenoca colon, lung, pancreas HRAS - bladder, kidney NRAS - melanoma, hematopoietic tumors