The correct answer is option 3: Planning Commission. The Planning Commission was a non-constitutional body in India. It was established in 1950 and was responsible for formulating and implementing India`s Five-Year Plans. The Commission consisted of a Chairman and a group of members appointed by the Government.
On the other hand, the Election Commission (option 1), Finance Commission (option 2), and Union Public Service Commission (option 4) are all constitutional bodies in India.
The Election Commission is responsible for conducting elections at various levels in the country. The Finance Commission is tasked with making recommendations on the distribution of financial resources between the central government and the state governments. The Union Public Service Commission is responsible for conducting examinations and selecting candidates for civil service positions.
Therefore, the Planning Commission is the correct answer as it is not a constitutional body.