NABARD (National Bank for Agriculture and Rural Development) was established on July 12, 1982, which falls within the Sixth Five Year Plan period (1980-1985). It was created to separate rural credit functions from RBI and focus on agriculture and rural development. Options A (Fourth Plan: 1969-1974), B (Fifth Plan: 1974-1979), and D (Eighth Plan: 1992-1997) are incorrect.