Former Chief of Staff to Governor Nasir El-rufai of Kaduna State, Hon. Muhammad Abdullahi, has emerged the senatorial candidate of the All Progressives Congress (APC) for Kaduna Central Senatorial district. He was returned unopposed in the primary election held at Umaru Musa Yar’adua Hall, Kaduna on Saturday after his two opponents, Usman Sani and Hajia Rabi Salisu withdrew from the contest.