The correct answer is (b), Dudhsagar Falls.
Dudhsagar Falls is a four-tiered waterfall located on the Mandovi River in the Indian state of Goa. It is the second highest waterfall in India, with a height of 310 meters (1,020 ft). The falls are located in the Bhagwan Mahaveer Sanctuary, a protected area of forest and wildlife.
The falls are a popular tourist destination, and can be reached by a jeep safari from the town of Mollem. There are also several hiking trails that lead to the falls.
The falls are best viewed during the monsoon season, when the water levels are high. However, they can be visited year-round.
The other options are incorrect because they are not located in Goa.
(a) Dhunwadhar Falls is located in the Indian state of Chhattisgarh.
(c) Nokhalikai Falls is located in the Indian state of Karnataka.
(d) Landshing Falls is located in the Indian state of Maharashtra.