This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General pathology, Subject name: Pathology
[{'content': "HLA B27 is not seen in- \nSelect and explain. \nA. SLE, B. Ankylosing spondylitis, C. Reiter's syndrome, D. Psoriotic ahritis", 'role': 'user'}, {'content': 'Answer: A \nExplanation: Harshmohan textbook of pathology 7th edition. SLE is associated with immuno regulatory function of class 2 HLA gene includes HLADR, HLADQ, HLADP..', 'role': 'assistant'}]