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
All the veins in the following drain to a Common structure except 
Select and explain. 
A. Great cardiac Vein, B. Anterior cardiac Vein, C. Middle cardiac Vein, D. Vein of Marshall
B: Anterior cardiac Vein
Answer: B: Anterior cardiac Vein 
Explanation: Anterior cardiac Veins directly drain into left atrium, rest all drain to Coronary sinus.