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: Microbiology
HLA - B47 is associated with 
Select and explain. 
A. Myasthenia gravis, B. Behcet's disease, C. Congenital adrenal hyperplasia, D. Abacavir hypersensitivity
C: Congenital adrenal hyperplasia
Answer: C: Congenital adrenal hyperplasia 
Explanation: HLA - B8 - Myasthenia gravis
HLA-B51 - Behcet's disease
HLA - B47 - CAH
HLA- B57 - Abacavir hypersensitivity.