You cannot select multiple values for an enumeration (an enum has only one value at a time in the database), which is why it's not available for checkboxes. If you need a user to check multiple checkboxes, I would recommend instead making a boolean attribute for each of the checkboxes, so each can have an “on” or “off” state (true or false).
Hi Raviprakash,
Instead of using enumeration you can use boolean attribute for each attribute and set default value to No or False.
Hope this will help you.