This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immune system, Subject name: Medicine
Kveim test is used for- 
Select and explain. 
A. Tuberculosis, B. Systemic lupus erythematosis tissue, C. Sarcoidosis, D. Cystic fibrosis
C: Sarcoidosis
Answer: C: Sarcoidosis 
Explanation: The Kveim test, Nickerson-Kveim or Kveim-Siltzbach test is a skin test used to detect sarcoidosis, where pa of a spleen or lymphnode 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 . Ref - pubmed.com