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
HLA DQA1 is associated with 
Select and explain. 
A. SLE, B. Sjogrens syndrome, C. Scleroderma, D. Ankylosing spondylosis
B: Sjogrens syndrome
Answer: B: Sjogrens syndrome 
Explanation: Molecular analysis of human leukocyte antigen (HLA) class II genes has revealed that Sjogren's syndrome, regardless of the patient's ethnic origin, is highly associated with the HLA DQA1*0501 allele. Reference: Harrison 19th edition PG: 2166