The White group is dead. The best resistance I found was to set up a nice snapback to catch the marked stones with .
DomQ The situation after Black 4 above is this. White is in a situation to snap-back the circled stones, but oddly enough this will not save her!
And the result is...
After , White won't be able to set up another snapback because of the liberty at a.
Playing 2 in 3 does not work either: Black captures the marked stone with 2, White attempts a Ko with 5 but Black declines, connecting all its stones together (at the location of the marked white stone). White is left with only one real eye.