RRB NTPC Prelims Model Paper 2 with solutions

(2) Ashok Mehta Committee recommended replacement of three-tier system of Panchayati Raj Institutions (PRIs) with two-tier system - at district level, Zila Parishad and at middle level, Mandal Panchayat, comprising of a group of villages covering a population of 15,000 to 20,000.