An autopsy is performed on a man who died of an unknown cause. The pathologist discovers that the deceased has a small atrial septal defect. The defect is seen in the portion of the atrial septum near the upper border of the fossa ovalis. Which of the following was the likely functional manifestation of this defect during life?

1. A)Prenatal cyanosis due to a shunt of blood from the left atrium to the right atrium
2. B)Postnatal cyanosis due to a shunt of blood from the right atrium to the left atrium
3. C)Prenatal cyanosis due to a shunt of blood from the right atrium to the left atrium
4. D)Postnatal cyanosis due to a shunt of blood from the left atrium to the right atrium
5. E)No cyanosis occurred prenatally or postnatallyGABARITO