I am trying to use 4 mosfet tansistor to build a H-bridge to control the motor. The input voltage should be 12V and 1A. Can any one suggest which mosfet transistor is suitable for the circuit.
Why bothering using discrete components for 1A?
You can use chips (look at digikey with keyword = full bridge, then in PMIC and
fan controllers sub category).
You will find many chips with every possible voltage / current / number of circuits.
You will save the trouble of designing a decent motor driver. You will get a smart, small
solution and probably more reliable than anything you can do by yourself.