True statement(s) concerning cardiac vascular anatomy include the following:
A.	In 80%–85% of cases the posterior descending coronary artery (PDA) arises from the circumflex coronary artery
B.	The PDA gives off the AV nodal artery
C.	The great cardiac vein ascends along the right coronary artery to empty into the coronary sinus
D.	Thebesian veins drain from only left and right ventricles
Answer:B
True statement(s) concerning cardiac vascular anatomy include the following:
A.	In 80%–85% of cases the posterior descending coronary artery (PDA) arises from the circumflex coronary artery B.	The PDA gives off the AV nodal artery C.	The great cardiac vein ascends along the right coronary artery to empty into the coronary sinus D.	Thebesian veins drain from only left and right ventricles