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': 'Superior thoracic apeure is bounded by following except \nSelect and explain. \nA. T1 veebra, B. 1st pair of ribs and their costal cailage, C. Superior border of the manubrium, D. Xiphoid process', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Superior thoracic apeure is not bounded by Xiphoid process B D CHOURASIAS HUMAN ANATOMY UPPER LIMB THORAX VOLU, 1 SIXTH EDITION, PAGE NO, 190', 'role': 'assistant'}]