Rangasamy, who is the Leader of Opposition, told reporters that the memorandum has been submitted to the official and said they have sought a direction to Narayanasamy to prove his majority on the floor of the House.
Kiran Bedi was removed as the Lt Governor of Puducherry last night and Telangana Governor Tamilisai Soundararajan, who has been assigned additional charge of the union territory would assume office on Thursday, sources said.
Soundararajan tweeted saying she received the warrant of appointment to discharge functions of Lieutenant Governor of Puducherry.
The resignation by John Kumar on Tuesday, who became the fourth legislator to quit the assembly since last month, reduced the numbers of the Congress-DMK alliance to 14 in the 33-member assembly and it now has an effective strength of 28.
The party position in the assembly as of Tuesday: Congress (10), DMK three, All-India NR Congress seven, AIADMK four, BJP three and one independent who had supported the government all along. Four Congress MLAs have resigned and one member had been disqualified.
Outgoing Lt Governor Bedi earlier in the day said her work was a sacred duty, fulfilling her constitutional and moral responsibilities.