<prompt> Esophagus is present in all except ?Superior mediastinumMiddle mediastinumAnterior mediastinumPosterior mediastinum  <response>: 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, 6e p. 246.Esophagus has no relation to anterior mediastinum. Thus, among the given options, best answer is anterior mediastinum. 