数据库：String Json vs new column

I'm developing a website and I need to store some question. I've a json like:

[{"id":"1","resp":"y"},{"id":"2","resp":"m"},{"id":"3","resp":"m"},{"id":"4","resp":"m"},{"id":"5","resp":"n"}

id = id question, resp = answer

I need to store this information and compare it with other user. What's the best way? Store one single json for user o create a database like

        idquestion1 idquestion2 idquestion3 idquestion4
user        yes         no          yes         boh

Now I use Php+mysql

This would be the best table design imho:

user_id | question_id | answer