This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pathology
[{'content': 'Most common abnormality of proto-oncogene in human tumours is \nSelect and explain. \nA. p53 point mutations, B. Point mutation in RAS family gene, C. Point mutation in C-kit gene, D. Overexpression of RET proto-oncogene', 'role': 'user'}, {'content': 'Answer: B \nExplanation: .', 'role': 'assistant'}]