Which of the following is not a tributary of azygos vein?: (A) Right posterior intercostal, (B) Right superior intercostal, (C) Left superior intercostal, (D) Accessory hemiazygos
Answer is C. Tributaries of Azygos vein

Right superior intercostal vein
Right posterior intercostal veins (5 to 11)
Hemiazygos vein
Accessory hemiazygos vein
Right bronchial vein
Esophageal, mediastinal and pericardial veins.