How to create a country dropdown?

You can use the dropdown block to add a new dropdown in your form.
After editing a drop-down on the right editor panel, follow these steps to add a country drop-down:
    Paste or write any number of options.
    Use this  Google Sheet  to copy the entire country list.
    Paste the list into your options to create a country dropdown.

P.S You can use the same sheet to create a  industries dropdown select.  Or you can use any other list and paste them in the options field editor to create a dropdown with a large number of options.