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
The most common vein to get thrombosed is the - 
Select and explain. 
A. Long saphenous, B. Short saphenous, C. Both, D. Posterior tibial
D: Posterior tibial
Answer: D: Posterior tibial 
Explanation: None