Dry ice is :

The correct answer is Option (3) → Solid carbon dioxide

Dry ice is solid carbon dioxide, \( \ce{CO2(s)} \). It is called “dry” because at normal pressure it does not melt: it changes directly into gas (sublimes) at about 195 K (−78°C), leaving no liquid behind. It is used as a refrigerant, for example to keep ice cream and frozen food cold.

    \( \displaystyle \ce{CO2(s)} \xrightarrow{195\ \mathrm{K}} \ce{CO2(g)} \)