The correct answer is: c) NITI Aayog (formerly Planning Commission)
NITI Aayog is a government body of India that was established in 2015. It is responsible for formulating development plans for the country. NITI Aayog has replaced the Planning Commission, which was established in 1950.
The State Finance Commission is a body that is responsible for recommending the distribution of financial resources between the state government and the local governments. The Assam Administrative Staff College is a training institute for government employees in Assam. The Directorate of Economics and Statistics is a government agency that is responsible for collecting and analyzing economic and statistical data.
NITI Aayog is the most appropriate institution to answer the question because it is the only institution that is responsible for formulating development plans for the country. The other institutions are responsible for other tasks.