This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Viral infections, Subject name: Dental
[{'content': 'The rash which is not central in predisposition is: \nSelect and explain. \nA. Epidemic typhus, B. Measles, C. Secondary syphilis, D. Typhoid', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Centripetal rash (Primarily central/truncal) Mnemonic: "Red Rashes Scare Parents Very Much" Centrifugal rash (Primarily on extremities) Mnemonic: You drive CARS with your Hands and Feet Rubella CA - Coxsackie A Virus (Hand, Foot, Mouth disease) Roseola R-Rocky Mountain spotted fever Scarlet fever S-Secondary syphilis Parvovirus B19 (Erythema infectiosum) Varicella Measles', 'role': 'assistant'}]