This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacteriology, Subject name: Microbiology
[{'content': 'Erythema Chronicum Migrans is feature of \nSelect and explain. \nA. Lyme disease, B. Leptospirosis, C. Acute rheumatic fever, D. Pancreatic Adenocarcinoma', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Hallmark of primary Lyme disease is Erythema Migrans: OMacular expanding erythematous lesion, central clearing. OBegins one month after the tick bite. OMean diameter 15 cm. Painless, can cause itching. Ref : Ananthanarayana textbook of Microbiology 9th edition Pgno : 378-380', 'role': 'assistant'}]