Most surfaces are made glossy by polishing.

Answer: Option C

Glossy : shiny and smooth.
Rough : having an uneven or irregular surface; not smooth or level.
Crude : in a natural or raw state; not yet processed or refined.
Dull : lacking brightness, vividness, or sheen.
Ugly : unpleasant or repulsive, especially in appearance.

Antonym of Glossy is Dull