using System;

using static System.Console;

using System.Collections.Generic;

​

public class Program {

    public static void Main() {

        var random = new Random();

        var ListaPerguntas = new List<string> { "Pergunta1", "Pergunta2", "Pergunta3", "Pergunta4" };

        WriteLine(ListaPerguntas[random.Next(ListaPerguntas.Count)]);

    }

}