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: Pathology
[{'content': 'True about syphilis is \nSelect and explain. \nA. Oral lesions are seen at any stage, B. Clinical manifestations occur after few months of exposure, C. VDRL test is positive in early days of primary syphilis, D. Penicillins are ineffective', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]