The correct answer is option 2: Super cooled liquid.
This option correctly defines the state of glass. Glass is not a crystalline solid, as it lacks the ordered structure that defines crystalline materials. Rather, glass is an amorphous solid, meaning it has a disordered atomic arrangement.
Glass is also not a condensed gas, as condensed gases still maintain their gaseous properties, while glass is solid. Additionally, glass is not a liquid crystal, which is a state of matter that exhibits both liquid and crystalline properties.
The term "super cooled liquid" refers to a liquid that has been cooled below its normal freezing point without solidifying. This is the case with glass, as it is formed by rapidly cooling a molten material, such as silica, to prevent it from crystallizing into a solid. As a result, glass retains its disordered atomic arrangement, giving it its unique properties.
Therefore, the correct option is 2: Super cooled liquid.