The correct answer is option 4, Planning Commission. The Planning Commission was a non-constitutional body formed in 1950 to formulate and promote five-year plans for India`s economic development. However, it was replaced by the NITI Aayog in 2014.

Option 1, the Election Commission, is a constitutional body that conducts and oversees elections in India. Option 2, the Finance Commission, is also a constitutional body that recommends the distribution of financial resources between the central government and the states. Option 3, the Union Public Service Commission, is responsible for conducting civil service examinations and appointments.

The Planning Commission, although influential in shaping India`s economic policies, was not mentioned in the Constitution and did not have the same constitutional status as the other three options. Alert - correct answer should be N/A.