You can use the ribbon command Insert | group Objects | Form object | Radio button to insert a radio button.
Radio buttons can be used in forms to select a single option from multiple options.
Using groupboxes to combine radio buttons
Important: Radio buttons must always be used in groups of at least two.
To indicate that a group of radio buttons belongs together, enclose them in a groupbox.
First insert the related radio buttons into the document (e.g. one below the other) and then use the ribbon command Insert | group Objects | Form object | Groupbox to wrap a group box around them.
Using radio buttons
Click one of the radio buttons to select it. Only one radio button within a group can be selected at a time.