This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Apoptosis, Subject name: Pathology
[{'content': 'Apoptosis is regulated by which gene? \nSelect and explain. \nA. p53, B. BRAC, C. N-myc, D. RB', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., p53", 'role': 'assistant'}]