//simple methods
                if(RadioButton1.Checked)
                {
                    cmd = New SqlCommand("insert into quser (uans) values('" + RadioButton1.Text + "', con)
                }
                else if(RadioButton2.Checked)
                {
                    cmd = New SqlCommand("insert into quser (uans) values('" + RadioButton2.Text + "', con)
                }
                else if(RadioButton3.Checked)
                {
                    cmd = New SqlCommand("insert into quser (uans) values('" + RadioButton3.Text + "', con)
                }
                else if(RadioButton4.Checked)
                {
                    cmd = New SqlCommand("insert into quser (uans) values('" + RadioButton4.Text + "', con)
                }
                cmd.ExecuteNonQuery()


                //or use radio button list
                //below code
                cmd = New SqlCommand("insert into quser (uans) values('" + RadioButtonList.SelectedValue + "', con)
                cmd.ExecuteNonQuery()