Thanks for the guide boss, platinumed.
After inspecting the rest of the routes, I realise that there are only 2 sets of possible questions.
In fact, there is only 1 question which truly changes.
The answer should be:
ごま団子 (The one which changes)
二十六歳 (The one which changes)
The numbering may not be the same so following the words is safer.
I am not sure if this applies to route 8, 9, 10 since this part appears earlier on.
I have no problem following the guide directly for these 3 routes though.
Edit: You can also consider adding in the method of pressing square -> triangle on previous option scene -> left option ; realised that it will help out people who press too fast and chose the wrong option. This way, they do not need to restart since there is no save.