Hi ,
Let's say your question name is Q1 and those 2 options are first 2 options. I would use pre skip on next questions as
Q1_1=0 or Q1_2=0
Goto Next questions.
Using this, we are checking, if any of them have not been checked move to next questions. In case you want, if both haven't selected then move to next questions, you should use below one.
Q1_1=0 and Q1_2=0
Goto Next questions.
Let me know for more help.