How to format a clue with “Abbr.” and “?”

I’m working on a crossword and have a couple misdirection clues with question marks at the end. But the answers also have abbreviations in them. How to incorporate both tags in my clue?

Do I still put a period and add the question mark after that, like this: Abbr.?

Or does the question mark replace the period, like this: Abbr?