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?
AnyChart Trial Version

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]}