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: Medicine
[{'content': 'A 20 yrs adult presents with severe hypo plastic anemia. what is most effective treatment - \nSelect and explain. \nA. α - interferon, B. IL -2, C. ATG therapy, D. Bone marrow transplant', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]