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 is present in all except ? \nSelect and explain. \nA. Superior mediastinum, B. Middle mediastinum, C. Anterior mediastinum, D. Posterior mediastinum', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. is \'c\' i.e., Anterior mediastinum Esophagus mainly descends in superior and posterior mediastinum.Esophagus is usually not a content of middle mediastinum, but it forms posterior boundry of middle mediastinum (BDC Vol.-1, 6`"/e p. 246).Esophagus has no relation to anterior mediastinum. Thus, among the given options, best answer is anterior mediastinum.', 'role': 'assistant'}]