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: Dental
[{'content': 'Ollendroff sign is seen in – \nSelect and explain. \nA. Primary syphilis, B. Secondary syphilis, C. Latent syphilis, D. Neurosyphilis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: There is deep dermal tenderness on application of pressure in secondary syphilis. This is known as an Ollendorff sign or Buschke ollendroff sign.', 'role': 'assistant'}]