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: Pathology
[{'content': 'Transfusion reaction and erythroblastosis fetalis are? \nSelect and explain. \nA. Type I hypersensitivity, B. Type II hypersensitivity, C. Type III hypersensitivity, D. Type IV hypersensitivity', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is `b' i.e., Type H hypersensitivity", 'role': 'assistant'}]