This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Misc. (R.B.C), Subject name: Pathology
[{'content': 'Routine Rh typing includes testing? \nSelect and explain. \nA. A antigen, B. B antigen, C. C antigen, D. D antigen', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., D antigen o After ABO, the most important antigen in transfusion practice is D. The D antigen is a member of the Rh system.", 'role': 'assistant'}]