Only the third statement, "Meandering of the Gandak River formed Kanwar Lake," is correct. The Kanwar Lake, one of the largest freshwater lakes in India, has been formed due to the meandering of the Gandak River, which is characteristic of riverine processes leading to lake formation.

In contrast, the Jhelum River does not pass through Wular Lake; instead, it is fed by it, and the Krishna River does not directly feed Kolleru Lake, as Kolleru is primarily influenced by the inflow of various seasonal streams and rainwater. Such geographical understanding is crucial for the UPSC exam, as it emphasizes the interrelationship between rivers and lakes and the geomorphological processes involved.