Constraint for options

Hi, I want to build a constraint for the following question:**

  1. Where do you buy coffee from?
    c- Najar
    (Respondents can choose multiple responses)

  2. Why don't you buy it from Starbucks?

I want to add a constraint here for only those who do not choose Starbucks. Even if they chose starbucks and McD i don't want this question to open. I want it to only options for answer that do not require Starbucks as an option.

Hi @ibtissamharb
you need to add both questions but the second one should be only displayed if:

not(selected(${question1}, 'starbucks')) 

to display/hide a question you need to use relevant column.

If you have any problems implementing it please attach your form.