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
[{'content': 'KRAS proto-oncogene is associated with \nSelect and explain. \nA. Colon cancer, B. Breast cancer, C. Bladder cancer, D. Melanoma', 'role': 'user'}, {'content': 'Answer: A \nExplanation: RAS Oncogenes Tumours with RAS mutations KRAS - adenoca colon, lung, pancreas HRAS - bladder, kidney NRAS - melanoma, hematopoietic tumors', 'role': 'assistant'}]