Which of the following non-metal is lustrous?

Lustrous metal is another name for metals that shine. Most of the metals have lustre.
For instance-  Gold, Silver, and Copper.
Sulfur, oxygen, and nitrogen are non-metals that do not have lustre, whereas iodine is a non-metal that has violet metallic lustre in its crystals.

Therefore, 'Iodine' is the correct response.