The stories and information posted in /b/ are artistic works of fiction and falsehood. Only a fool would take anything posted here as fact.
All the true Biharis- who were responsible for the Mauryan Empire, shunga empire, etc migrated to the north. And settled in Punjab and Haryana and in the mountains. Bihari population was replaced by Dalits
Bihar se saare UCs ja chuke hai. Everyone is a dalit there they keep gaslighting themselves