Clean, dry air is made up of nitrogen, oxygen and only tiny quantities of other gases. The noble gases are not included in the table. Which row gives the composition of clean, dry air?
- Anitrogen 21%, oxygen 78%, small amount of carbon dioxide
- Bnitrogen 21%, oxygen 78%, small amount of carbon monoxide
- Cnitrogen 78%, oxygen 21%, small amount of carbon dioxide
- Dnitrogen 78%, oxygen 21%, small amount of carbon monoxide