Radiobutton Group that has no Pre-Selections

Hi Experts,

I am updating a survey/questionnaire to include selection button group (radiobutton).

Is there a way to NOT have any default selections until a selection is made by the user?

I tried unchecking the "Selected" checkbox in the answer option for all radiobuttons, but when I save it the first answer option is defaulted. Is there a way to have no pre-selections for the radiobutton group?

Thank you,

Nanda