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
[{'content': 'Haemolytic disease of newborn is an example of \nSelect and explain. \nA. Type 3 hypersensitivity reaction, B. Type2 hypersensitivity reaction, C. Ahur reaction, D. Type 4 hypersensitivity reactions', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ref Robbins 7/e p211,9/e p206 Autoimmune hemolytic Anemia Red cell membrane proteins (Rh blood group antigens, I antigen) Opsonization and phagocytosis of erythrocytes Hemolysis, anemia Autoimmune thrombocytopenic purpura thrombocytopenic Platelet membrane proteins (GpIIb/IIIa integrin) Opsonization and phagocytosis of platelets..leads to bleeding..type 2 hypersensitivity reaction', 'role': 'assistant'}]