kevindomadia:
can you please suggest any opamp... as in the model no. or something?!
In theory virtually any opamp(s) can be used, as it's not so much the specific opamp used, but rather the circuit it's used in. There are opamps that are optimized for use in low level bridge circuits, but first you are better off understanding the basics of interfacing with low level bridge type devices. This seems to be a useful article to start off with:
Lefty