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: Pathology
A 4-month old infant is brought to the physician for a routine examination. Physical examination shows epicanthic folds and a palmar simian crease. Cytogenetic testing shows an autosomal trisomy. 
Which of the following cardiac anomalies is most commonly associated with this condition? 
Select and explain. 
A. Atrial septal defect, B. Complete Atrioventricularseptal defect, C. Mitral stenosis, D. Patent ductusarteriosus
B: Complete Atrioventricularseptal defect
Answer: B: Complete Atrioventricularseptal defect 
Explanation: None