What is the Panchayati Raj system, and who proposed it? (MCAER 2018)

Options:

A two-tier system of local self-government proposed by the Ashok Mehta committee.
A three-tier system of local self-government proposed by the Balwant Rai Mehta committee.
A four-tier system of local self-governance proposed by the G.V.K. Rao committee.
A system of agricultural cooperatives proposed by the V. Kurien committee.