This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Thorax, Subject name: Anatomy
[{'content': 'Blood supply of ventral 2/3rd of interventricular septum of hea is \nSelect and explain. \nA. Right coronary aery, B. Left coronary aery, C. Posterior interventricular aery, D. Marginal aery', 'role': 'user'}, {'content': "Answer: B \nExplanation: The posterior interventricular aery, a branch of right coronary aery, supplies the posterior 1/3 of the interventricular septum. The remaining anterior 2/3 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 CHAURASIA'S HUMAN ANATOMY UPPER LIMB THORAX-VOLUME-1 SIXTH EDITION Page-265", 'role': 'assistant'}]