Arteries are best defined as the vessels which
Carry blood away from the heart to different organs
Break up into capillaries which reunite to form a vein
Carry blood from one visceral organ to another visceral organ
Supply oxygenated blood to the different organs
As we have learnt:
Arteries
So,
Arteries are best defined as the vessels which carry blood away from the heart to different organs. Hence, the correct answer is option a.