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UPSC Civil ServicesPrelims2024General Studies Paper I
Question
QQ33. Which one of the following is synthesised in human body that dilates blood vessels and increases blood flow ?
Options
- A Nitric oxide
- B Nitrous oxide
- C Nitrogen dioxide
- D Nitrogen pentoxide
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Correct Answer
A Nitric oxide
Model Answer
Answer: option A, as per UPSC's final answer key (Series A).