This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: CVS Embryology, Subject name: Anatomy
Which of the following congenital cardiovascular malformations is most commonly associated with maternal rubella infection? 
Select and explain. 
A. Isolated dextrocardia, B. Patent ductus aeriosus, C. Persistent truncus aeriosus, D. Coarctation of the aoa
B: Patent ductus aeriosus
Answer: B: Patent ductus aeriosus 
Explanation: Patent ductus aeriosus (PDA) is the most common congenital cardiac malformation associated with rubella infection of the mother. It is unclear how the rubella virus acts to cause PDA. RUBELLA:-PDA>pulmonary stenosis