O Levels Biology (5090)•5090/11/O/N/18

Explanation
Organs with dual blood supply from artery and vein
Steps:
- Most organs receive oxygenated blood only from arteries; veins typically drain blood away.
- The liver is an exception, receiving oxygenated blood via the hepatic artery and nutrient-rich blood via the portal vein.
- Evaluate each option's pattern of ✓ (dual supply) and x (single supply) against known organs.
- Option C matches the pattern where only one specific organ (e.g., liver) has dual supply, while others do not.
Why C is correct:
- C's pattern (x x ✓) identifies the liver, which uniquely receives arterial blood from the hepatic artery and venous blood from the portal vein, per circulatory anatomy.
Why the others are wrong:
- A (✓ ✓ x): Incorrectly marks two organs with dual supply; only liver qualifies.
- B (x x x): Falsely denies dual supply to all, ignoring the liver.
- D (x x ✓): Duplicate of C but likely mislabels the organ or context.
Final answer: C
Topic: Circulatory system
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