Correct Answer: (a) Prayag - Haridwar - Ujjain - Nashik
Solution:Kumbh Mela is also known as Purna Kumbh takes place every twelfth year at following four places: Prayagraj, Haridwar, Ujjain, and Nashik. However, U.P. government has changed the name of Kumbh mela (every 12 year) to Mahakumbh and Ardh Kumbh mela (every 6 year) to Kumbh (at Prayagraj).