The highest waterfall in the world is :

The correct answer is (b), Angel Falls. It is located in the Canaima National Park in Bolívar state, Venezuela, on the border with Guyana. The waterfall descends over the edge of the Auyán-tepui, the world’s highest sheer drop, 979 meters (3,212 ft).

(a) Victoria Falls is located on the border between Zambia and Zimbabwe. It is the largest waterfall in the world measured by the volume of water flowing over it.

(c) Niagara Falls is located on the border between the United States and Canada. It is one of the most popular tourist destinations in the world.

(d) Tugela Falls is located in KwaZulu-Natal, South Africa. It is the highest single-drop waterfall in Africa.