This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Anatomy
[{'content': 'Esophagus enters through \nSelect and explain. \nA. Central tendon of diaphragm, B. Along aoic opening, C. Muscular pa of diaphragm, D. All', 'role': 'user'}, {'content': 'Answer: C \nExplanation: C. i.e. Muscular pa of diaphragm', 'role': 'assistant'}]