You can create poll questions that are not evaluated for a correct answer, which can be helpful with open-ended or even survey-type questions.
Open the quiz editor by creating a new quiz or editing an existing quiz. Under the 'Create a question' section, click the Poll option to start creating a poll or a no-correct-answer question.
You can have one or multiple responses to a question. To enable multiple responses, you can toggle the 'Allow more than one selection' option at the bottom of your screen.
You can easily spot these questions in your quiz by the blue circles that appear next to each option choice.