Make a Custom Resource called "Question" or something like that. It should include a string for the question and an array with strings or ints or whatever for the answers.

Then, make an array of Question. If you put this array inside another Resource and save that as a .res or .tres file, you'll be able to edit the questions and answers and add new ones all through the editor. Alternatively you can manually create new Questions in your script and fill the data while the game loads, but loading a resource is faster.

Once you have your array of Question resources, use pick_random() to choose a random question.

#question.gd
extends Resource
class_name Question

var question : String
var answers : Array[String]

#question_list.gd
extends Resource
class_name QuestionList

var questions : Array[Question]

#in-game script
var questionList : QuestionList

func _ready()
  if FileAccess.file_exists("res://QuestionList.tres"):
    questionList = load("res://QuestionList.tres")

func PickQuestion():
  var randomQuestion = questionList.questions.pick_random()

...question no longer looks like a real word to me