Dry ice is A. Solid ammonia B. Solid sulphur dioxide C. Dry carbon dioxide gas D. Solid carbon dioxide

The correct answer is D. Dry ice is solid carbon dioxide. It is a white solid that is used as a refrigerant and in dry ice blasting. It is also used in the production of dry ice fog and dry ice sculptures.

Option A is incorrect because solid ammonia is a white, crystalline solid that is used as a refrigerant and a solvent.

Option B is incorrect because solid sulfur dioxide is a yellow, crystalline solid that is used as a bleaching agent and a drying agent.

Option C is incorrect because dry carbon dioxide gas is a colorless, odorless gas that is used in fire extinguishers and in the production of carbonated beverages.