Hi @anamikadutt,
Would you mind trying out as outlined in the image below to control your none of the above response in a multiple choice question:
In the survey tab of your xlsform:
In the choices tab of your xlsform:
Data entry screen as seen in Enketo: When entered correctly
Data entry screen as seen in Enketo: When entry error is made
Reference xlsform:
Constraint.xlsx (12.6 KB)
Have a great day!
