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': 'A child has fever with redness of cheek. The causative organism fohis condition is: \nSelect and explain. \nA. Herpes virus, B. Parvovirus B-19, C. Adenovirus, D. Rubella', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. (B) Parvovirus B-19Exanthema infectiosum:The characteristic rash first appears as erythematous flushing on the face in a slapped cheek appearance (red cheek).The most common manifestation of parvovirus B19 is erythema infectiosum, also known as fifth disease, which is a benign, self-limited exanthematous illness of childhood.It was the 5th in a classification scheme of common childhood exanthems.The preceding 4 exanthems were measles, scarlet fever, rubella, and Filatov-Dukes disease (an atypical scarlet fever), with roseola infantum as the "sixth disease', 'role': 'assistant'}]