input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** All of the following are true about venous drainage of esophagus except:   (A) Thoracic esophagus drains into the azygos vein   (B) Esophageal veins drain into a submucosal plexus   (C) The cervical esophagus drains directly into the right brachiocephalic vein   (D) Lower esophageal veins anastomose with the left gastric vein
output: ['(C) The cervical esophagus drains directly into the right brachiocephalic vein <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Thoracic esophagus drains into the azygos vein  (B) Esophageal veins drain into a submucosal plexus  (C) The cervical esophagus drains directly into the right brachiocephalic vein  (D) Lower esophageal veins anastomose with the left gastric vein <> possible answers', '  All of the following are true about venous drainage of esophagus except: <> context']