This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardio thoracic surgery  , Subject name: Anatomy
Intralobar sequestration of lung receives blood supply from 
Select and explain. 
A. Pulmonary aery, B. Descending abdominal aoa, C. Internal mammary aery, D. None of the above
B: Descending abdominal aoa
Answer: B: Descending abdominal aoa 
Explanation: A sequestration consists of normally developed bronchioles and alveoli supplied by systemic rather than pulmonary aeries. 95% of the time this blood supply is from the Aoa either above or below the diaphragm. Other characteristic features of sequestration - They occur most commonly in the lower lobes, L > R Lung sequestrations are of two types Intralobar and Extralobar