This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General Considerations - Infectious Diseases, Subject name: Pediatrics
A 10-year-old child had fever for 5 days, along with which he developed multiple fluid filled lesions on the lips as shown below. What is the probable underlying etiology for the skin lesions? 
Select and explain. 
A. Cytomegalovirus, B. Herpes simplex virus, C. HIV, D. Syphilis
B: Herpes simplex virus
Answer: B: Herpes simplex virus 
Explanation: b Herpes simplex virusMultiple fluid filled lesions on the lips, as shown, in a child who had fever, suggests Herpes labialis caused by Herpes simplex virus (HSV)