Which one among the following statements is correct?

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Q: 15 (NDA-I/2012)

Which one among the following statements is correct?

question_subject: 

Science

question_exam: 

NDA-I

stats: 

0,23,10,5,1,23,4

keywords: 

{'pulmonary vein': [2, 0, 1, 1], 'pulmonary artery': [1, 0, 0, 0], 'oxygenated blood': [0, 0, 0, 1], 'other arteries': [0, 0, 0, 1], 'other veins': [0, 0, 0, 1], 'arteries': [0, 1, 0, 0], 'veins': [2, 0, 0, 0], 'blood': [5, 0, 0, 1]}

Option 1 states that all arteries carry oxygenated blood. Arteries are blood vessels that carry blood away from the heart, and they generally carry oxygenated blood. However, there are two exceptions to this rule - the pulmonary artery and the umbilical artery. The pulmonary artery carries deoxygenated blood from the heart to the lungs to be oxygenated, while the umbilical artery carries deoxygenated blood from the fetus to the placenta during fetal development. So, option 1 is not correct.

Option 2 states that all veins carry oxygenated blood. Veins are blood vessels that carry blood back to the heart, and they typically carry deoxygenated blood. The exception to this rule is the pulmonary vein, which carries oxygenated blood from the lungs to the heart. Therefore, option 2 is not correct.

Option 3 states that except for the pulmonary artery, all other arteries carry oxygenated blood. This statement is correct. The pulmonary artery is the only artery that carries deoxygenated blood.

Option 4 states that except for the pulmonary vein, all other veins carry oxygenated blood. This statement is not correct. The pulmonary vein is the only vein that carries oxygenated blood.

Therefore, the correct statement is option

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