An unordered list can use one of four different bullet options: disc, square, circle, or triangle.

An unordered list can only use on three different bullet options such as circle, square, and disc but not on triangle. The unordered HTML list is disc which set the list item marker to a bullet (default), circle which sets the list item marker to a circle, square which set the list item marker to a square and none which the items will not be marked. So it is false.