This should be your perfect choice
ntel i3 3210 - rs 6600
Gigabyte b75 d3h - rs 4000
Corsair vengance 4gb 1600mhz - rs 2500
Wd cavier blue 500gb - rs 3000
Saphhire hd 7750 1gb ddr5 - rs 6500
Antec bp300 psu - rs 1700
Any local cabinet - rs 800
Logitech Keyborad and mouse mk200 - rs 700
Total - rs 25,800
Please have look and you can game on it