Option 1 -> Prayagraj is located at the confluence of Ganga and Yamuna rivers in Uttar Pradesh, not on Godavari.
Option 2 -> Nagpur is situated in Maharashtra but lies on the Nag River, not the Godavari.
Option 3 -> Baghpat is a city in Uttar Pradesh and is not associated with the Godavari river.
Option 4 -> Nashik is located on the banks of the Godavari river in Maharashtra.
Hence, Option 4: Nashik -> Nashik is a major city in Maharashtra situated on the banks of the Godavari river. The Godavari originates from Trimbakeshwar, which is near Nashik, making it one of the most important cities along this sacred river -> correct