I'm not familiar with this PBC library (and I suspect the same goes for many others here). Please post a link (using the chain links icon on the forum toolbar to make it clickable) to where you downloaded that library from. Or if you installed it using Library Manger (Sketch > Include Library > Manage Libraries in the Arduino IDE or Libraries > Library Manager in the Arduino Web Editor) then say so and state the full name of the library.
What exactly do you mean by "install the PBC library on Arduino nano"? We don't install libraries on Arduino boards, so this question doesn't make sense. Please provide a detailed description of what you want to accomplish, what you have tried, and what problems you encountered when you tried it.
abhijeetthakare:
Could you mention email ID?
No thanks, I get plenty enough spam already. We can just communicate here on the forum. It works great!