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': 'Kveim test is used for diagnosis of? \nSelect and explain. \nA. Sarcoidosis, B. Sicca syndrome, C. Scleroderma, D. C.R.E.S.T syndrome', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The Kveim-Siltzbach test is a skin test used to detect sarcoidosis, where part of a spleen from a patient with\xa0known sarcoidosis is injected into the skin of a patient suspected to have the disease. If non caseating\xa0granulomas are found (4-6 weeks later), the test is positive.', 'role': 'assistant'}]