This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Infectious disease, Subject name: Pediatrics
Which of the following is the most common congenital viral infection? 
Select and explain. 
A. Rubella, B. Cytomegalovirus, C. Herpes simplex, D. HIV
B: Cytomegalovirus
Answer: B: Cytomegalovirus 
Explanation: *Human CMV is widely distributed. *CMV is the most common cause of congenital infection,which occasionally causes the syndrome of cytomegalic inclusion disease in neonates. Reference: Nelson textbook of pediatrics 21st edition Page 1115