This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
Buerger's disease usually affects all of the following except: September 2009, 2010 
Select and explain. 
A. Small sized aeries, B. Medium sized aeries, C. Large aeries, D. Deep veins
C: Large aeries
Answer: C: Large aeries 
Explanation: Ans. C: Large Aeries