All opens into coronary sinus except -: (A) Middle cardiac vein, (B) Small cardiac vein, (C) Anterior cardiac vein, (D) Great cardiac vein
Answer is C. Tributaries of the coronary sinus
-        Great cardiac vein
-        Middle cardiac vein
-        Small cardiac vein
-        Posterior vein of the left ventricle
-        Oblique vein of the left atrium
-        Right marginal vein sometimes.