Which of the following correctly describes the composition of inspired air?

Inspired air primarily consists of a mixture of gases, with nitrogen being the most abundant component. In fact, nitrogen makes up about 78% of the total composition of the air we breathe, which is why the option indicating high nitrogen concentration is correct.

While inspired air does contain oxygen, which is vital for cellular respiration and typically makes up around 21% of the atmosphere, it does not have a particularly "high" concentration in absolute terms compared to nitrogen. Additionally, carbon dioxide is present in very small amounts (around 0.04%) in inspired air, and hydrogen is not a significant component of atmospheric air at all. Therefore, highlighting the high concentration of nitrogen accurately reflects the composition of inspired air.