Eight newly-elected MPs of the Rajya Sabha, including Congress chief Mallikarjun Kharge and BJP leader Tarun Chugh, took oath as members of the Upper House on Monday. Rajya Sabha Chairman C P Radhakrishnan administered the oath of office to the new members. While Kharge took the oath separately in Radhakrishnan's chamber, the seven other members took oath in the Rajya Sabha chamber.