QS:Mandatory
From LimeSurvey Manual
General Options
Description
This option allows the survey administrators to request their respondents to answer to certain survey questions. If the mandatory questions are not answered, the respondents will not be able to proceed further. If you have a question with multiple subquestions and you require only certain subquestions to be answered, use the "min_answers" question attribute instead.
Valid values:
- Yes
- No (default)