Interface MultipleChoiceItem

A question item that allows the respondent to select one choice from a list of radio buttons or an optional "other" field. Items can be accessed or created from a Form. When used in a quiz, these items are autograded.

// Open a form by ID and add a new multiple choice item.
var form = FormApp.openById('1234567890abcdefghijklmnopqrstuvwxyz');
var item = form.addMultipleChoiceItem();
item.setTitle('Do you prefer cats or dogs?')
    .setChoices([
        item.createChoice('Cats'),
        item.createChoice('Dogs')
     ])
    .showOtherOption(true);