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 is not anti-apoptotic gene? \nSelect and explain. \nA. BCL-XL, B. MCL-1, C. BCL-XS, D. BCL-2', 'role': 'user'}, {'content': 'Answer: C \nExplanation: BCL-XS is pro-apoptotic gene.', 'role': 'assistant'}]