External Affairs Minister S Jaishankar was among nine MPs who took the oath as members of the Rajya Sabha on Monday.
The oath was administered by Chairman Jagdeep Dhankhar in the Rajya Sabha chamber in Parliament House.
Jaishankar took the oath in English. This is his second term as a Rajya Sabha MP.
He was first elected in 2019.
Besides Jaishankar, the other Bharatiya Janata Party members who took the oath are Babubhai Jesangbhai Desai (Gujarat), Kesridevsinh Digvijaysinh Jhala (Gujarat), and Nagendra Ray (West Bengal).
Five Trinamool Congress MPs — Derek O’Brien, Dola Sen, Sukhendu Sekhar Ray, Prakash Chik Baraik and Samirul Islam — also took the oath. O’Brien, Sen, Islam and Ray took the oath in Bengali. Of the nine members who took oath on Monday, five are newly elected Nagendra Ray, Prakash Chik Baraik, Samirul Islam, Kesridevsinh Digvijaysinh Jhala and Babubhai Jesangbhai Desai.
Four members took the oath in Bengali, three in Hindi and two in English, a statement from the Rajya Sabha secretariat said.
Leader of the House and Minister of Commerce and Industry Piyush Goyal, secretary general of the Rajya Sabha PC Mody and other senior officials of the secretariat were also present on the occasion.