Correct option is A
Air: A gas composed of various gases (primarily nitrogen and oxygen).
Water: A liquid at room temperature (H₂O).
Ice: The solid state of water (frozen water).
Steam: The gaseous state of water (vapor).
Conclusion: Air is the odd one out because it is not a form of water. The other three options (Water, Ice, and Steam) are all different states of H₂O.
The correct answer is (a) Air.