Enable Other choice
If you want to give your respondents the option to type an answer which does not exist among
the available answers, you can always enable the other option. Enabling other adds
a text box in which your respondents can type in their own answer. These type of questions are also
known as “open-ended” questions, and they allow you to collect answers that you may not have thought
of when making your survey.
Note:
Respondents’ manually added answers will be shown all together, as a group in Live analytics,
called “Other”. To be able to view them one by one, you need to export your survey data or preview the data in the Individual Responses view.
Tip:
When you enable the “Other” choice, you will notice that a text box gets added as the last
choice in the list of choices. By default, this text box gets the lablel: “Other”. However,
you can simply edit it to anything you need. Perhaps you need to type the label in your own
language or explain something more.
Open-ended vs. closed questions
How to choose between open-ended and closed questions when designing a survey? Generally, open-ended questions are questions that do not provide response options. When you ask a respondent to answer in his/her own words, you are using an open-ended question. However, “closed,” or “forced-choice” questions, also known as Single selection or Multiple selection questions, are those that offer a limited number of responses from which the respondent can choose the best answer or answers. These two types of questions are used for different purposes and require the evaluator to analyze and interpret data in distinct ways.Tips:
Nevertheless, the narrative type of responses collected via open-ended questions can be more
complex and harder to analyze. Also, it will be harder to make a nicely illustrated report
from the responses. Such answers usually require more interpretation than well-designed
forced-choice questions.
Single selection 
Multiple selection