Which property is used to add attribute to an item in html?

Question

item, group, itemgroup,.... these are options.

Answer 1

This is a question in challenges, right?
Hint : You didn't mention the answer here.

Answer 2

When you say "item", are you talking about list items ?

Answer 3

I don't know answer here, these options I remember now.

Answer 4

I don't know what this question is asking. its challenge question and not clear as expected