<prompt> Blood supply of ventral 23rd of interventricular septum of hea isRight coronary aeryLeft coronary aeryPosterior interventricular aeryMarginal aery  <response>: The posterior interventricular aery, a branch of right coronary aery, supplies the posterior 13 of the interventricular septum. The remaining anterior 23 is supplied by the anterior interventricular aery which is a septal branch of the left anterior descending aery, which is a branch of left coronary aery . B D CHAURASIAS HUMAN ANATOMY UPPER LIMB THORAX-VOLUME-1 SIXTH EDITION Page-265 