This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Systemic Lupus Erythematous, Subject name: Medicine
[{'content': 'Onion skin spleen is seen in: \nSelect and explain. \nA. ITP, B. Thalassemia, C. SLE, D. Scleroderma', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Three histological lesions are most characteristic of SLE Onion skin lesion of splenic aery Libman sacks endocarditis Hematoxylin bodies Onion skin pattern is seen in: Splenic aery in SLE Ewing sarcoma Charcot marie tooth disease Primary sclerosing cholangitis Malignant HTN', 'role': 'assistant'}]