You need to create seperate pre defined list with mother brand. Let say your list name is ''mainBrandList" with options
Now let's say you have Q1 where you are asking sub-brand of these mother brand. Those options are
Now to call mother brand to another question you should create separate constructed list and use perl code to add mother brand here. Let say my constructed list name is "MotherBrand", parent list shoud be "mainBrandList" for this constructed list.
Begin Unverified Perl
if(VALUE('Q1_1')==1 or VALUE('Q1_2')==1)
if(VALUE('Q1_3')==1 or VALUE('Q1_4')==1)
if(VALUE('Q1_5')==1 or VALUE('Q1_6')==1)
You need to call this "MotherBrand" List now where you want to use.
Let me know in case of more clarification.