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
Kveim test is used for diagnosis of? 
Select and explain. 
A. Sarcoidosis, B. Sicca syndrome, C. Scleroderma, D. C.R.E.S.T syndrome
A: Sarcoidosis
Answer: A: Sarcoidosis 
Explanation: The Kveim-Siltzbach test is a skin test used to detect sarcoidosis, where part of a spleen from a patient with known sarcoidosis is injected into the skin of a patient suspected to have the disease. If non caseating granulomas are found (4-6 weeks later), the test is positive.