True about atrioventricular groove are all except ?

Ans. is 'a' i.e., Contains left anterior descending coronary aeryGrooves (sulci) of heaA) Atrioventricular grooveAtria are separated by ventricles by atrioventricular Sulcus (atrioventricular groove, also called coronary sulcus).It is divided into anterior and posterior pas. The right half of anterior pa is large and lodges right coronary aery. Left half of anterior pa is small and lodges circumflex branch of left coronary aery.B) Interventricular groovesRight and left ventricles are separated by interventricular grooves.Anterior interventricular groove is nearer to left margin of hea and contains anterior interventricular aery (also called left anterior descending aery).Posterior interventricular groove is situated on diaphragmatic (inferior) surface. It contains posterior interventricular aery (continuation of RCA).