Explanation:

- The Tapovan Vishnugad Hydroelectric Project is a run-of-the-river project.

- ?? Option 1: Uttarakhand

- Correct location of the Tapovan Vishnugad Hydroelectric Project.

- Situated in the Chamoli district along the Dhauliganga River.

- Option 2: Himachal Pradesh

- Known for other hydroelectric projects like Bhakra Nangal and Nathpa Jhakri.

- Option 3: Ladakh

- Famous for its cold desert and strategic military importance.

- Option 4: Jammu and Kashmir

- Rich in natural resources and scenic beauty.

Your answer is spot on, and you've chosen the correct location.