Get selected answer from dropdown list JS

Get selected answer from dropdown list JSHi I have tried it but It show us nothing in console. How can I see it works true?
Well I have run it before page not submited:
Qualtrics.SurveyEngine.addOnPageSubmit(function () { 
var SelectedChoices = jQuery("#"+this.questionId+" option:selected").text() 
console.log(SelectedChoices); });
Then, I submit page and I wait It show us selected answer in previous submited page. But It shows me nothing.
I guess it doesnt find this.questionId. How can I fix it?
Thanks.

@firat,
The problem isn't with this.questionId. The JS is to get the text from a dropdown, and your question isn't a dropdown.

I've been using the following to extract the text from the webpage itself, maybe it'll work for you as well.

Qualtrics.SurveyEngine.addOnPageSubmit(function (type) {
    if (type == "next") {
        var selChoice = this.getSelectedChoices();
        var choiceRef = "";
        var choiceText = "";
        for (let i = 0; i < selChoice.length; i++) {
            choiceRef = "#" + this.questionId + "-" + selChoice[i] + "-label > span";
            choiceText = document.querySelector(choiceRef).innerHTML;
            Qualtrics.SurveyEngine.setEmbeddedData(choiceText,true);
        }
    }
});