Xcode Quiz look-a-like app with question and answer

I am trying to create a quiz look-a-like app, where the person who holds the phone ask the question, and the other people answer. So there will be two Strings. One with question, and one with the answer. I have created the questions something like this:

var questions = ["Question1", "Question2", "Question3", "Question4", "Question5"]
var answers = ["Answer1", "Answer2", "Answer3", "Answer4", "Answer5"]

When the tap a button, a new question with correct answer pops up. I know how I can display a random string from questions, but how do I connect it to also display the correct answer?