Correct Answer: 2015

Solution : The correct answer is (c) 2015.

The Planning Commission was replaced by the NITI Aayog on January 1, 2015. The NITI Aayog is a policy think tank that was created by the Government of India to replace the Planning Commission. The NITI Aayog is designed to be more flexible and responsive to the needs of the Indian economy.

The Planning Commission was established in 1950 and was responsible for formulating India's five-year plans. The NITI Aayog does not have the same powers as the Planning Commission, but it is still expected to play a significant role in the Indian economy.