Which is the correct portosystemic anastomosis?

• A. Portal = tributary of inferior mesenteric vein, systemic = tributary of internal iliac vein
• B. Portal = periumbilical vein, systemic = phrenic veins
• C. Portal = intrahepatic portal branches, systemic = azygos vein
• D. Portal = left gastric vein, systemic = IVC via oesophageal veins
• E. Portal = middle rectal vein, systemic = inferior rectal vein