This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Vascular surgery, Subject name: Surgery
Most commonly varicose veins are seen in 
Select and explain. 
A. Sho saphenous vein, B. Long saphenous vein, C. Popliteal vein, D. None of the above
B: Long saphenous vein
Answer: B: Long saphenous vein 
Explanation: The usual distribution of varicose veins is below the knee in branches of the greater saphenous system.