The correct answer is option 1 - Planning Commission. The Planning Commission was an extra-constitutional body in India that existed from 1950 to 2014. It was responsible for formulating the Five-Year Plans and allocating resources for various developmental projects in the country. However, it was not provided for in the Constitution of India.
The other options mentioned in the question, i.e., UPSC (Union Public Service Commission), Finance Commission, and Election Commission are all constitutional bodies mentioned in the Constitution of India.
The UPSC is responsible for conducting examinations for appointments to the services of the Union and various states. The Finance Commission is constituted every five years to recommend the distribution of financial resources between the Union and the states. The Election Commission is responsible for the conduct and supervision of elections in India.
It is important to note that the Planning Commission has been replaced by the NITI Aayog (National Institution for Transforming India) in 2015, which is a policy think tank of the Government of India.