Duco paints are

Answer: Option B

The correct answer is Option B: Cellulose paints
Here's why:

* Duco paints are a type of lacquer.
* Lacquers are known for their fast-drying, durable, and glossy finish.
* Cellulose paints are a common type of lacquer.
* They use cellulose nitrate or cellulose acetate as the main film-forming ingredient.

Let's look at the other options:

* Plastic paints: While they might contain plastics, this is too broad a term. Duco is a specific type of paint, not just any paint with plastic in it.
* Emulsion paints: These are water-based paints, and Duco paints are generally solvent-based.
* Oil paints: Oil paints dry slowly and have a different composition than Duco paints.