I am trying to limit the combination of responses to a question. I have read about how to limit this when using None, Don’t know and so on. But in my case, The choice list for this question has a, b, c, d. The respondent can only choose a maximum of up to three responses, but can only choose either b or c, with any combination of the rest of the choices. This means that you can’t have both b and c selected for the same respondent.
Thanks a lot Kal_Lam for the feedback. Unfortunately, your suggestion does not resolve my issue. With this form, I am not allowed to select the last 4 items in the list. However, with my form all options can be selected. However, option b and option c cannot both be selected by the same respondent. Any combination can be selected of either 1 response, 2 responses or 3 response as long as option b and c are not selected for the same entry. I hope this is clearer than the one that I posted earlier.