The diagram illustrates the blood vessels linked to the liver. Which blood vessels are labelled X, Y and Z?
- AX: hepatic artery, Y: hepatic portal vein, Z: hepatic vein
- BX: hepatic portal vein, Y: hepatic artery, Z: hepatic vein
- CX: hepatic vein, Y: hepatic artery, Z: hepatic portal vein
- DX: hepatic vein, Y: hepatic portal vein, Z: hepatic artery