Arteries generally carry blood full of\nOptions:\n- (A) He\n- (B) Au\n- (C) O3\n- (D) O2\n- (E) DDT\n- (F) Ni\n- (G) CO2\n- (H) gas
Think hard. Detailed solution:
(D)
Arteries generally carry oxygen-rich blood.

About O2, every living thing requires oxygen in order to live.

Arteries generally carry blood full of O2.

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Final answer: (D)