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
[{'content': 'Which of the following mutations in a tumour suppressor agent causes breast carcinoma:- \nSelect and explain. \nA. p43, B. p53, C. p73, D. p83', 'role': 'user'}, {'content': 'Answer: B \nExplanation: . p53', 'role': 'assistant'}]