WRONG about venous drainage of hea:: (A) Coronary sinus is guarded by Thebesian valve, (B) Middle cardiac vein lies in posterior atrioventricular groove, (C) Great cardiac vein accompanies left anterior descending aery, (D) Venae cordis minimi open into all four chambers
Answer is B. Middle cardiac vein lies in posterior interventricular (not atrioventricular) groove.