I want to add padding inside the dropdown list what is the css label for this?

I want to add an amount of white space inside each drop box in the table rows. Can you provide the correct identifier for me to do this?

If I understand correctly, you want to add padding in the options within the dropdown list? Unfortunately, it is not possible to style the options in the dropdown field as they are rendered by the OS. A possible workaround would be to use plugins that will help you style these options. Here's a list of possible plugins you can use: http://plugins.jquery.com/tag/select/.

However, please note that you will need to use the full source code of the form if you will use plugins, otherwise it will not be possible to use them on jotform.