What to show in the input field when multiple items are selected?

1. Which of the following input fields allow user to select multiple values?
2. Which of the following input fields allow the user to select multiple values Radio checkbox none of these Datalist?

Which of the following input fields allow user to select multiple values?

Checkboxes allow a user to select multiple choices.

Which of the following input fields allow the user to select multiple values Radio checkbox none of these Datalist?

Datalist allow the user to select multiple values.

It can be used to provide fast choices for an input field, such as an "autocomplete" function.