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': 'A 55 year old male presented with angina. Coronary angiography revealed a block in the right coronary aery. The condition is likely to cause a decrease in blood supply through all of the following blood vessels except \nSelect and explain. \nA. Acute Marginal, B. Posterior interventricular aery, C. Aery to SA node, D. Circumflex aery', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Circumflex aery is not a branch of the right coronary aery. It is the branch of the left coronary aery. The branches of the right coronary aery are: Right coronary aery-It is the first branch of the right coronary aery. Aery of the SA node. Acute right marginal aery. Posterior interventricular aery (in 65% population) Atrial and anterior and posterior ventricular branches. Ref: Gray&;s Anatomy 41st edition Pgno: 1016', 'role': 'assistant'}]