How to have a select box option that once selected cannot be selected anymore

I would like to create form with say 5 choices/boxes. When someone selects a box and puts their name in it, that name will appear and be frozen, so no one else can select it.
Is something like this do able?
Thanks,
Phil

Hi Phil,

Thank you for contacting us. I also recommend creating an account if you haven't yet.

You can sign up using your email account at https://www.jotform.com/signup

As to your inquiry, please check on User Contributed Dropdown list widget.

You can test the demo form here https://form.jotform.com/53550853486968

What it does is, it allows the form user to add the unique option in the dropdown list (i.e. they can add their name). Once the option was added it cannot be duplicated or repeated in the dropdown list.

I hope this help. Let us know if you need further assistance.