public class Quizs
    {
        [Key]
        public int QuizId { get; set; }

        public string Title { get; set; }

        public string Instructions { get; set; }

        public string IsTimerEnabled { get; set; }

        public virtual ICollection<Question> Questions { get; set; }
    }

    public class Question
    {
        [Key]
        public int QuestionId { get; set; }

        public virtual ICollection<Answers> Answers { get; set; }

        public int RightAnswer { get; set; } // Key of Answers[]

        public int QuestionType { get; set; } // 1 = One choise, 2 = Multiple Choise

        public string Explantion { get; set; } // To appear after answering the question

        public int MaxTime { get; set; } // In seconds

        [ForeignKey("Quiz")]
        public int QuizId { get; set; }

        public virtual Quizs Quiz { get; set; }
    }

    public class Answers
    {
        [Key]
        public int asId { get; set; }

        public int Id { get; set; }

        public string Text { get; set; }

        [ForeignKey("Questions")]
        public int QuestionId { get; set; }

        public virtual Question Questions { get; set; }
    }