Which of the following constitutes a true vascular ring?
A. Pulmonary artery sling.
B. Double aortic arch.
C. Anomalous origin of right subclavian artery from the descending aorta.
D. Cervical aortic arch.
Answer:B
Which of the following constitutes a true vascular ring?
A. Pulmonary artery sling. B. Double aortic arch. C. Anomalous origin of right subclavian artery from the descending aorta. D. Cervical aortic arch.