'3' => {MultipleChoiceCheckbox: {'1' => {iscorrect: '1', txt: 'a31'},
                                                                          '2' => {iscorrect: '0', txt: 'a32'},
                                                                          '3' => {iscorrect: '1', txt: 'a33'},
                                                                          '4' => {iscorrect: '0', txt: 'a34'}}}},