Tactics&traps in the Petroff Defense

This post is about tactical themes in the Petroff Defense :

1e4 e5 2Nf3 Nf6 3 Ne5 d6 4 Nf3 Ne4 5d4 d5 6 Bd3 Be7 70-0 Bg4 8 Re1 Nc6 9Nbd2 f5 10 c3 0-0 11 Qb3 variation.

11..Na5 12Qa4 12..Nc6 13 Bb5 Nd2 14 Nd2 Qd6 15 h3 Bh5 16 Nb3 Bh4 17 Nc5 Rae8

Here we reach the position after 18 Bd2

Black to play after 18 Bd2

Black can play 18..Bf3!?, which is a thematic and recurrent move in the Petroff Defense (Analysis position here-This may qualify as an opening novelty, although I don't have any recent database). The aim here is to show chess patterns and motifs , and not listing the existing games in a given opening.

Position after 18..Bf3!? White to play

Here's an hint (Read below after studying the diagram!)

Would you play

A) 19 gxf3

B) 19Nxb7

C)19Bf1

Tactics straight from the (Petroff) opening lab.

Good luck!