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: Pediatrics
[{'content': 'Erythema infectiosum is seen in – \nSelect and explain. \nA. Rubella, B. Fifth disease, C. Scarlet fever, D. Diphtheria', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Erythema infectiosum also was known as the fifth disease is caused by Parvo Virus (B-19).\n\nErythema infectiosum\n\nMost common clinical manifestation of human parvovirus infection.\nMost common complication is arthritis\nIncubation period is 4 to 14 days.\nProdromal illness is minimal\n\nCharacteristics skin lesions appear in 3 stages :\n\nIst phase → Cheeks are erythematous giving appearance of slapped cheeks.\n2nd phase → Itching erythematous maculopapular rash on extensor surface (Palms and soles spared).\n3rd phase → begins to fade and disappears in about 2 weeks.', 'role': 'assistant'}]