Planning Commission was replaced by NITI Aayog on _____________.

Correct option is C

Introduction
The Planning Commission was an institution of the Government of India that formulated India's Five-Year Plans. It was dissolved and replaced by a new institution named the National Institution for Transforming India (NITI Aayog), which came into effect on 1 January 2015. NITI Aayog functions as a "think tank" for the Government of India.
Information Booster
· Predecessor: Replaced the decades-old Planning Commission.
· Date of Establishment: 1 January 2015.
· Function: Serves as a "think tank" or advisory body for the Government of India, providing strategic and technical advice on policy matters.
· Chairman: The Prime Minister of India is the ex-officio Chairperson of NITI Aayog.
· Approach: It follows a "bottom-up" approach, involving states in economic policy-making, unlike the Planning Commission's "top-down" approach.
Additional Points
· 1 January 2016, 1 April 2016, and 1 April 2015 are incorrect dates for the establishment of NITI Aayog.