public IEnumerable <question> Questions(int id)
 {
     return(bllService.GetQuestionsBySubcategory(id).Select(q => new question
     {
         questionID = q.questionID,
         questionText = q.questionText,
         option1 = q.option1,
         option2 = q.option2,
         option3 = q.option3,
         option4 = q.option4,
         marks = q.marks,
         answer = q.answer,
         answerType = q.answerType,
         complexity = q.complexity
     }));
 }