Hello, Sunill - you can choose the "Pick, Group and Rank" question type in the survey builder and specify "none" and "don't know" as your "Items" for them to populate into ranking groups. I hope that helps!

Hi AdamK12 ,

Thanks for your response buddy. The problem is that respondent can either rank options or select "Don't know" or "None". Respondent can not select "Don't Know" and rank options as well together.
If I put specify "None" and "Don't know" inside items then it is possible that respondent drag these two options along with other options as well.
Hope you understand my question here.

Sunill Now I do--sorry I can't be of more help. I've upvoted your questions so others in the community can help...

Hi AdamK12
No worries Buddy and don't be sorry:)

Did you ever find a solution to this? I have the exact same issue...

You can add a multi-select multiple choice question with a 'Don't know' choice after the ranking question. Then add custom validation to the ranking question where the conditions are based on the ranking question AND the multiple choice question.
Optionally, you can add JS to make the questions look and operate as one question.

@Jamamel, show ranking question first and add "Don't Know" option after ranking question on same page. Now add display logic in Ranking question i.e. show this question only if "Don't know' not selected and click on "In Page (In Page Display Logic may be incompatible with Forced Responses)" property as well.
Now, when you test the survey, respondent will see Ranking question along with "Don't Know" and it will ask respondent to provide rank in ranking question when you click next without answering anything. If you click on "Don't know" then ranking question will get hide and you can move forward to next question.

Please let me know if this helps or do you have any query?

Note: I find it best approach because doing so you don't need to add custom validation and default validation of Qualtrics will take care of all ranking validations.

Very nice, elegant solution Sunill ... Thanks for sharing!
Thanks also, TomG . I think you were suggesting something very much along the lines to Sunill, who, conveniently for me, spelled it out for us noobies.

No Worries Jamamel .Please do reach out to me in case you need any further help. :)