This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Thorax, Subject name: Anatomy
Middle cardiac vein is accompanied by 
Select and explain. 
A. Anterior interventricular aery, B. Left circumflex aery, C. Posterior Interventricular aery, D. Diagonal aery
C: Posterior Interventricular aery
Answer: C: Posterior Interventricular aery 
Explanation: The middle cardiac vein commences at the apex of the hea; ascends in the posterior longitudinal sulcus along with posterior interventricular aery, and ends in the coronary sinus.Ref: V.S Volume 1; 2nd edition; Page: 276