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
Left sided superior vena cava drains into? 
Select and explain. 
A. Right Atrium, B. Left Atrium, C. Coronary Sinus, D. Pericardial Space
C: Coronary Sinus
Answer: C: Coronary Sinus 
Explanation: Left Superior Vena Cava drains directly into the coronary sinus and by way of the coronary sinus into the right atrium. Left SVC thus, drains into both, the coronary sinus and the right atrium.