Answer: Rajya sabha
Notes: As per the Constitution of India, a new All India service can be instituted with only on the initiative of Rajya Sabha. Article 312 of the constitution says
"Notwithstanding anything in [Chapter VI of Part VI or Part XI], if the Council of States has declared by resolution supported by not less than two-thirds of the members present and voting that it is necessary or expedient in the national interest so to do, Parliament may by law provide for the creation of one or more all India services [(including an all-India judicial service)] common to the Union and the States, and, subject to the other provisions of this Chapter, regulate the recruitment, and the conditions of service of persons appointed, to any such service."
