Bengal headquarter of firms generating black money: JD(U) 
JD(U) leader Harivansh Narayan Singh on Thursday mocked West Bengal CM Mamata Banerjee for opposing Centre's demonetisation move and said that the state is the headquarters of companies involved in the generation of black money. Claiming that more than 200 companies are involved in the generation of black money, Singh added, "It is these companies that exploit the common man."