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': 'Which prevents apoptosis of Memory B Cells? \nSelect and explain. \nA. Platelet derived Growth Factor, B. Nerve Growth Factor, C. Fibroblast Growth Factor, D. IGF', 'role': 'user'}, {'content': 'Answer: B \nExplanation: .', 'role': 'assistant'}]