<prompt> Operation for chronic Pancreatitis are the following exceptBegers procedureLongitudinal pancteaticojejunostomyFreys procedureNone  <response>: Surgical procedure Drainage Puestow procedure Paington and Rochelle Modification of puestows procedure Duval procedure Begers procedure Warrens modification of Begers procedure Freys procedure Berne modification Hamburg modification of Freys Ref: Sabiston 20th edition Pgno :1534 