I know how to post a poll in a Facebook group, but it seems not to be possible to add a picture in the poll question. Would there be a workaround, such as entering an URL of a picture that gets replaced by the actual picture, or HTML code?
I think Facebook may be testing out an image based poll function, have a look at the following example : https://www.facebook.com/wongmjane/posts/1967658150230313?pnref=story
Theres another example facebook image poll here: https://www.facebook.com/thenextweb/posts/10155732517028523
UPDATE As of 1st Dec 2017, it looks like Facebook have rolled this feature out to everyone now. Image polls seem to be limited to personal accounts for now.