Slav defense has a solid reputation:
Also the Queen's Gambit Declined Orthodox Variation is solid and has lots of ways to play it for white and black just like the Slav:
And the Queen's Gambit's Accepted is not bad either, just don't expect to keep the pawn in most lines:
Off course there are other lines likes the Bf5 line:
And the Chigorin defense to the Queen's Gambit, they are lesser played though then the first 3 options, they can be tricky but to each it's own:
Other lines have lesser reputations when it concerns the Queen's Gambit, for instance the Marshall defence:
I need to know the best defense against queen's gambit. HELP!!!!!