Hey,
Sorry, the project is a complete mess.. It will take a lot of time to make it right. You select an answer and then players should click correct questions?! This is some broken logic! :)
I suggest you search for a better example, there should be lots of tutorials on how to make this kind of quiz games.
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And all this can be done much much easier. You don't need any arrays.
You need one "Question" sprite with animations A, B, C, D etc. Each animation contains one frame - big fancy letter.
And one "Answer" sprite with animations also named A, B, C, D etc. Only in this sprite each animation should contain lots of different pictures starting with this letter. For example, in animation A you can have two frames - airplane and acorn.
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So when the game starts, you set a random animation name to the question sprite, say "B".
Then you spawn different answers, with random animations and random frames from each animation.
When player clicks an answer, you simply check if question.AnimationName=answer.AnimationName
If animation names match, the answer was correct, that's it!