Coarctation of Aoa is most commonly associated with which of the following structural defects?

Coarctation of Aoa is associated with Bicuspid Aoic Valve in 40% of patients. Clinical manifestations of coarctation depend on site & extent of obstruction and the presence of associated cardiac anomalies, most commonly a bicuspid aoic valve. Ref: Current Surgical 12th Edition, Page 426; Harrison's 16th Edition, Page 1387.