Party's leader A Navaneethakrishnan along with S R Balasubramoniyan, R Vaithilingam and A Vijayakumar took oath in the House.
Except for Vijayakumar, all other members took oath in English. Vijayakumar took oath in Tamil.
The House also mourned the passing away of its former member Adbul Gaiuyur Qureshi on March 13 at the age of 83 years.
An advocate by profession, Qureshi represented Madhya Pradesh in the Upper House from April 1996 to April 2002.
"In passing away of Qureshi, the country has lost a distinguished parliamentarian, an able administrator and a legal luminary," Ansari said.
