private bool IsExist(int AOID)
    {
        bool result = false;

        try
        {
            Student student = (Student)(Session["currentStd"]);
            if (student != null)
            {
                Answer ans = new Answer();
                result = ans.IsAnswerExist(AOID, student.StudentOID);
            }
            //result = true;
        }
        catch (Exception ex)
        { }
        return result;
    }