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': "Mononeutritis multiplex is a major presenting feacture of - \nSelect and explain. \nA. Systemic necrotising vasculitis, B. Wagner's granulomatosis, C. Hypersensitivity vasculitis, D. Mucocutaneaous lymphnode syndrome", 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]