Which one of the following is synthesized in the human body that dilates blood vessels and increases blood flow?

Which one of the following is synthesized in the human body that dilates blood vessels and increases blood flow?

(a). Nitric oxide (b). Nitrous oxide (c). Nitrogen dioxide (d). Nitrogen pentoxide Explanation: Nitric oxide is a molecule produced in the body that plays a crucial role in various physiological processes, including vasodilation (widening of blood vessels). This leads to increased blood flow. Therefore, the correct option is (a).