Deshratna Dr. Rajendra Prasad Dugdh Utpadak Sahkari Sangh Limited (DRMU) populerly known as Barauni Dairy, is the largest milk union in the eastern part of India - an industrially deprived region. sixth May, 1992 was the day when Barauni Dairy was handed over by Bihar State Cooperative Milk Producers’ Federation limited to the management of Milk Union.