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: Anatomy
Sho saphenous vein in a tributary of: 
Select and explain. 
A. Medial marginal vein, B. Lateral marginal vein, C. Posterior tibial vein, D. Dorsal venous arch
B: Lateral marginal vein
Answer: B: Lateral marginal vein 
Explanation: Lateral marginal vein