Hi Hemant Kumar,
As correctly mentioned by Mary G Bluetooth is optional in N5050 system. Please check if the Bluetooth card was shipped with the system.
You may check the original configuration of your system from Here -> Type the Service Tag of the computer -> Click on System Configuration -> Original Configuration and share the Wireless card shipped with the system.
If you are not sure, please share the original configuration here. I would be glad to help you.
