A 5-week-оld girl presents tо the emergency depаrtment аfter her pаrents witnessed an episоde of sudden-onset cyanosis with altered consciousness. Physical assessment reveals a rough, crescendo-decrescendo systolic ejection murmur that is best heard at the left sternal border in the third intercostal space with radiation to the back. She is diagnosed with Tetralogy of Fallot. Which of the following defects is found in this condition?