This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Aerial disorders, Subject name: Surgery
Adson's test is used for determining vascular insufficiency. It is useful in:- 
Select and explain. 
A. Peripheral vascular disease, B. Varicose veins, C. Cervical rib, D. AV fistula
C: Cervical rib
Answer: C: Cervical rib 
Explanation: Adson's test is used for determining vascular insufficiency due to Cervical rib.