tactics from Corus: So-Giri

15-year-old Anish Giri's mother is Russian, his father is from Nepal, so naturally he plays for the Dutch federation.  He'll be playing in the A section of Corus next year!

Anish Giri: winner of the Corus B section

Here's the crucial position from Giri's game against another prodigy, Wesley So of the Phillipines:

So-Giri, Corus 2010

White to play: what's the best move?

A) 36.Ne2  B) 36.Qxd1 C.) 36.Qxd4 D) 36.Ra2

White is up two bishops (!) for a bunch of pawns.  But getting mated would be bad.  

Hint: one move probably wins, one move probably draws, one move definitely draws, and one move definitely loses.