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': 'Deep cardiac plexus is present at \nSelect and explain. \nA. Tracheal bifurcation, B. Myometrium, C. At end of svc, D. At right bronchus', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Deep cardiac plexus is situated in front of the bifurcation of trachea B D CHOURASIAS HUMAN ANATOMY UPPER LIMB THORAX VOLUME ,1 SIXTH EDITION, PAGE NO, 267', 'role': 'assistant'}]