Best response to the Scandinavian Defense: Portuguese Gambit, Classical Variation (B01)

1. e4 d5 2. exd5 Nf6 3. d4 Bg4 4. Nf3 · Black to move

What is the best response to the Scandinavian Defense: Portuguese Gambit, Classical Variation (1. e4 d5 2. exd5 Nf6 3. d4 Bg4 4. Nf3)? Black to move. See the top replies ranked by opening theory and real-game results, starting with Nxd5.

The main theoretical reply is Nxd5, reaching the Scandinavian Defense: Modern Variation, Gipslis Variation.