Explanation:

- Option 1: Dudhsagar

- Correct Answer

- Dudhsagar Falls is located on the Mandovi River in the Indian state of Goa. It's one of the tallest waterfalls in India.

- Option 2: Duduma

- This waterfall is located on the border of Odisha and Andhra Pradesh, not in Goa.

- Option 3: Gokak

- Gokak Falls is found in the state of Karnataka, not Goa. It's known for its horse-shoe shape.

- Option 4: Shivasamudram

- This waterfall is in Karnataka, formed by the Kaveri River, and not located in Goa.