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: Microbiology
[{'content': "Which of the following features is not shared between `T cells' and B cells' - \nSelect and explain. \nA. Positive Selection During Development, B. Class I MHC Expression, C. Antigen Specific Receptors, D. All of the above", 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]