public async Task <List <QuestionVM> > GetQuestionByCategoryId(Guid id)
{
var questions = await _questionnaireRepository.GetAllQuestionnairesByCategoryId(id);
foreach (var question in questions)
{
question.Choices = JsonConvert.DeserializeObject <QuestionOptionsVM>(question.Options);
question.Options = null;
}
return(questions);
}