Just Black's fourth most popular choice in this position.
1. e2e4 After choosing 1.d4 in the third game, which resulted in a win despite failing to gain an opening advantage, Gukesh returns to his favorite move. 1... e7e6 Ding chooses the French Defense again, showing that it's not a one-game choice, but probably his main weapon against 1.e4 in the match. 2. d2d4  2... d7d5  3. e4d5 A surprising decision, since the Exchange Variation is not the most exciting option and White has several ways to achieve sharp play in the French. I expected Gukesh to create as much tension as possible in the opening. 3... e6d5  4. g1f3  4... g8f6  5. f1d3 