This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
Which of the following features is not shared between T cell and B cell 
Select and explain. 
A. Antigen specific receptor, B. Class 1 MHC expression, C. Positive selection during development, D. All the above
C: Positive selection during development
Answer: C: Positive selection during development 
Explanation: Ref Robbins 8/p209 T cells (thymus cells) and B cells (bone marrow- or bursa-derived cells) are the majorcellular components of the adaptive immune response. T cells are involved in cell-mediated immunity, whereas B cells are primarily responsible for humoral immunity (relating to antibodies). And the positive selection during development