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
A “Potential Anastomosis” seen in 
Select and explain. 
A. Labial branch of facial artery, B. Intercostal artery, C. Coronary artery, D. Arterial arcades of mesentery
C: Coronary artery
Answer: C: Coronary artery 
Explanation: Arterial anastomosis is the communication between the arteries, or branches of arteries. It may be actual or potential.

Actual Arterial Anastomosis: In actual arterial anastomosis the arteries meet end to end. For example, palmar arches, plantar arch, circle of Willis, intestinal arcades, labial branches of facial arteries.
Potential Arterial Anastomosis: In potential arterial anastomosis the communication takes place between the terminal arterioles. Such communications can dilate only gradually for collateral circulation. Therefore on sudden occlusion of a main artery, the anastomosis may fail to compensate the loss. The examples are seen in the coronary arteries and the cortical branches of cerebral arteries.