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
True regarding course of great saphenous vein is all except 
Select and explain. 
A. Begins at the saphenous opening, B. Runs along posteromedial aspect of knee joint, C. Associated with saphenous nerve in lower part of leg, D. Posterior arch vein is one of its tributaries
A: Begins at the saphenous opening
Answer: A: Begins at the saphenous opening 
Explanation: Great saphenous vein begins from medial part of dorsal venous arch of foot.