<prompt> Venous drainage of esophagus is into the:Azygous and inferior thyroid veinsAzygous, inferior thyroid and left gastric veinsAzygous, inferior thyroid and right gastric veinsSuperior thyroid, inferior thyroid veins, azygous and hemi-azygous veins  <response>: Ans. b. Azygous, inferior thyroid and left gastric veins 