Plugin to identify keywords from answer inputs that can then be identified as correct/wrong

I’m trying to make a website where the questions are either multiple choice or long-written answers, so I have 2 problems.

For the multiple choice, how would I be able to list 5 answers to choose from, all listed under the same question type, and be able to have

And for the long-written answers, is there a plug-in or action in which it can analyse an answer to look for specific keywords to mark that answer as correct or wrong?

There is

Awesome thanks! Will figure out how to use it.