@SuppressWarnings("unchecked")
	public int getCorrectChoiceIndex() {
		ArrayList<String> questionList = (ArrayList<String>) question;
		for (int i = 0; i < questionList.size(); i++) {
			if (questionList.get(i).equals((String)answer))
				return i-1;
		}
		System.out.println("Cannot find correct choice index");
		return -1;
	}