One choice - dropdown (type:'dropdown')

Source code: Survey setup
Survey.defaultBootstrapCss.navigationButton = "btn btn-primary";
Survey.Survey.cssType = "bootstrap";
var survey = new Survey.Model({ questions: [
    { type: "dropdown", name: "car", title: "What car are you driving?", isRequired: true, colCount: 0,
        choices: ["None", "Ford", "Vauxhall", "Volkswagen", "Nissan", "Audi", "Mercedes-Benz", "BMW", "Peugeot", "Toyota", "Citroen"] }
]});

function onAngularComponentInit() {
    Survey.SurveyNG.render("surveyElement", {model:survey});
}
var HelloApp =
    ng.core
        .Component({
            selector: 'ng-app',
            template: '<div id="surveyContainer" class="survey-container contentcontainer codecontainer">' +
            '<div id="surveyElement"></div></div>'
        })
        .Class({
            constructor: function() {
            },
            ngOnInit: function() {
                onAngularComponentInit();
            }
        });
document.addEventListener('DOMContentLoaded', function() {
    ng.platformBrowserDynamic.bootstrap(HelloApp);
});

There are several ways to set the 'choices' property.

// The classic way to set the property. The result values are numbers: 1 and 2
choices: [{ value: 1, text: "Value 1" }, { value: 2, text: "Value 2" }]
// The values are: 1 and 'Value 2' and texts are '1' and 'Value 2'
choices: [{ value: 1 }, { value: "Value 2" }]
// The values and texts are same
choices: ["Value 1", "Value 2"]
// The values are '1' and '2' and texts are 'Value 1' and 'Value 2'
choices: ["1|Value 1", "2|Value 2"]

Choices order: (default is 'none')

var q = survey.getQuestionByName('car');
q.choicesOrder = yourvalue; 
survey.render();

var q = survey.getQuestionByName('car');
q.hasOther = yourvalue; 
survey.render();

Others text

var q = survey.getQuestionByName('car');
q.otherText = yourvalue; 
survey.render();