How do I dynamically duplicate form fields?

For example, say I have two dropdown menus. Is there a way to add a button such that every time I press the button, a copy of these two form fields appears?

You can duplicate each field, but if you want to duplicate multiple fields at once, here is how: https://www.jotform.com/help/242-How-to-manage-multiple-fields 

Let us know if you need more help.