The highest multipurpose dam built on the river Ravi is ?
Link rivers with major dams: Ravi → Ranjit Sagar; Sutlej → Bhakra Nangal; Rihand → Rihand Dam.
Step 1: The Ranjit Sagar Dam, also known as the Thein Dam, is built on the Ravi river in Punjab-Jammu & Kashmir border.
Step 2: It is the highest earth-fill multipurpose dam in India constructed on the Ravi river.
Step 3: Bhakra Nangal is on the Sutlej river, Rihand dam is on the Rihand river, and Kahalgaon is a thermal power station in Bihar, not a dam. \[ \boxed{\text{Ranjit Sagar Dam}} \]