The correct answer is option 4, Tapti. A rift valley is a type of valley that forms when the Earth`s crust breaks and separates. The Tapti river flows through the Tapti Valley, which is a part of the Narmada Rift Valley. The Tapti Valley was formed due to tectonic activity in the region, which caused the Earth`s crust to separate and create a rift. This rift valley is located in central India, and the Tapti river flows through it. The other rivers mentioned in the options, Luni (option 1), Chambal (option 2), and Sone (option 3), do not flow through rift valleys. They flow through other geographical features like plains or plateaus.