A congenital defect in which the opening between the pulmonary artery and the aorta that allows blood to pass across during fetal circulation before birth fails to close after birth is known as:
A) coarctation of the aorta
B) patent ductus arteriosus
C) atrial septal defect
D) tetralogy of Fallot
B
Explanation: If you do not recall the individual conditions, utilize deconstructing terms to reason it out. Patent means "open," a duct is a tube in layman's terms, and arteri/o is the combining form for "artery." These word parts are similar to the key ones in the question, opening between pulmonary artery and aorta, which is also an artery.
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