my lap have 4 GB RAM & 2 GB VGA. Its Intell i3 Lap.so I would like to know what are the best games for my lap?

Well I think so U might be able to play Far Cry 3 on Medium or low settings, MAx Payne 3 on May be High settings, Battlefield 3 on Medium-High settings as well as Assassins Creed Games Till Assassins Creed III on High settings.........

I think U will be having 1366x768 Screen resolution!!!

Check Which GPU U have. IF it is Nvidia or AMD, then U are surely playing these games.
If Intel Graphics, then it is dificult to say anything........