Boundary of the Kochs triangle is not formed by:: (A) Tricuspid valve ring, (B) Coronary sinus, (C) Tendon of todaro, (D) Limbus fossa ovalis
Answer is D. Triangle of koch is landmark for AV node with its transition zone. It is bounded by tendon of todaroQ (superiorly), tricuspid valve septal leafletQ (inferiorly) and coronary sinus orificeQ (basally)