Koscielny is injured so Vermaelen was a given, unless you wanted Sagna at CB and Jenkinson at RB. Jenkinson doesn't seem to be quite ready for it yet.
For some reason Wenger doesn't want to play Podolski, so it's the Ox and Cazorla instead of Rosicky and Podolski. That means Arteta is in, because Wilshere is injured. I guess he could have picked Rosicky and moved the Ox back though.
Sanogo probably isn't that bad tbf. I don't know what's happening with Giroud. Did he play for France this week? (No clue about France national team tbh)