Carlsen's choice

With his passed a-pawn White of course wants to win, but Black is threatening 41...Nf2+ picking up the rook d1. Exchange sacrifice, flight forward or repeating move - what would you choose?
A) 41.Rxd4
B) 41.Kg2 Nf4+ 42.Kg3 Ne2+ 43.Kg4 Rf4+ 44.Kh5 Rf5+ 45.Kxh6
C) 41.Kg2 Nf4+ 42.Kh1 Nh3 (=)

Oliver Reeh in ChessBase Magazine
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