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
[{'content': 'HLA complex is on chromosome? \nSelect and explain. \nA. 6, B. 7, C. 8, D. 9', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., 6 HLA complex of genes is located on the sho arm of chromosome 6.", 'role': 'assistant'}]