how to include none option to a radio button field which is marked required

Question

Basically I need the custom field to be a required field with options yes/no. By default currently some value is selected for this field. The value should not be preselected. It should either be blank, or a none option should come up which acts as default. If the user proceeds with none, it should error saying the field is required and either yes/no should be selected.
Any solution for this requirement is highly appreciated!
Thanks

Joe Pitt · Answer

You need to remove the default value from the configuration.

Deepa Tantry · Answer

Thanks for all your responses!!!

When i create the radio button with yes/no options, by default i see "None" Option enabled and selected.
When i make the field required, the none option vanishes and the "No" Option is selected by Default. I do not want the field to preselect the value to both Yes or No.

Say, the User does not notice this field in the screen but he actually had to select "Yes" as an option. However, the field is defaulted to option "No". If the user proceeds, we would not know if the selected option was given by the user or it was because of the default value.

Please let me know if there is a way to remove the preselection from the Radio button.

Appreciate your responses.
Thanks for your help.

Joe Pitt · Answer

If you just want to verify they saw the field and picked something you need to have an option of N/A or something like that they can select indicating none of the others apply, but I picked something.