This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Dental
[{'content': 'Exanthema subitum is caused by \nSelect and explain. \nA. HHV, B. HCV, C. HIV, D. HPV', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Exanthema subitum is caused by human herpesvirus 6 and 7 Most common exanthematic fever in children under 2 years of age. First fever for 3-5 days as fever subsides discrete rise pink maculopapules develop on neck and trunk and then elsewhere. After 1 or 2 days rash fades leaving no scaling and pigmentation Treatment: Most cases of HHV-6 infection get better on their own If encephalitis occurs ganciclovir or foscarnet may be useful Ref: Harrison 20th edition pg 1278', 'role': 'assistant'}]