You could do the same as outlined in the image below:
In the survey tab of your xlsform:
In the choices tab of your xlsform:
Data entry screen as seen in Enketo:
Reference xlsform:
Auto Select.xls (29.5 KB)
Note: You could also use the ready_only
if you wish to have the response for Q2
locked as shown in the image below:
Reference xlsform:
Auto Select.xls (29.5 KB)