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': 'If the circumflex aery gives off the posterior interventricular aery, then the aerial supply is called \nSelect and explain. \nA. Right dominance, B. Left dominance, C. Balanced dominance, D. Codominance', 'role': 'user'}, {'content': 'Answer: B \nExplanation: If the circumflex aery gives off the posterior interventricular aery, then the aerial supply is called left dominance. In 65% of the population, the posterior interventricular aery (PIVA) is a branch of right coronary aery and this is called the right dominance. In 10% of the population, PIVA is given by the circumflex aery (a branch of the left coronary aery) and this is called the left dominance. Ref: Gray&;s Anatomy 41st edition Pgno: 1019', 'role': 'assistant'}]