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: Microbiology
[{'content': 'Arthus reaction is an example of \nSelect and explain. \nA. Type 1 HSN, B. Type 2 HSN, C. Type 3 HSN, D. Type 4 HSN', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Examples of Type - 3 HSN\n\nArthus reaction\nSerum sickness\nGlomerulonephritis\nRheumatoid arthritis.', 'role': 'assistant'}]