Dropdown is similar to the Radio Button, however, the respondent cannot see all answers directly, instead, the respondent first has to select the dropdown field. Furthermore, dropdown has the possibility to add a placeholder, but cookies cannot be set with the answers and the answers cannot be shown as buttons.
To see how often an answer has been selected, you need to add the dropdown element as many times to your chart as the number of possible answers to your question. Next, you set the data calculation of each series to ‘Count’, filter each series to one (or more, if you want to group answers) answer. Then, group the data against ‘All data’, and use a column chart.