Concept:Dry ice is the common name for solid carbon dioxide.
Explanation:Dry ice is
CO2​ in its solid state.
It is also known as cardice.
It sublimes directly from solid to gas at normal atmospheric pressure.
It is widely used as a refrigerant for ice cream and frozen food.
Liquid carbon dioxide cannot exist under normal atmospheric pressure.
Liquid nitrogen is produced by fractional distillation of liquid air and is a different coolant.
Liquid ammonia is used in refrigeration but is not called dry ice.
Thus, among the given options, only solid carbon dioxide is called dry ice.
Answer:Option A – Solid carbon dioxide