A famous river gorge found in Arunachal Pradesh is the:

Tawang Gorge
Sela Gorge
Dihang Gorge
Lohit Gorge

The correct answer is: c) Dihang Gorge.

The Dihang Gorge is the deepest river gorge in the world, located in the Indian state of Arunachal Pradesh. It is formed by the Brahmaputra River as it flows through the Himalayas. The gorge is about 170 kilometers long and up to 10 kilometers wide. The Dihang Gorge is a popular tourist destination, and is known for its stunning scenery and its rich biodiversity.

The other options are incorrect because:

  • Tawang Gorge is a river gorge located in the Tawang district of Arunachal Pradesh. It is formed by the Tawang Chu River as it flows through the Himalayas. The gorge is about 50 kilometers long and up to 5 kilometers wide.
  • Sela Gorge is a mountain pass located in the West Kameng district of Arunachal Pradesh. It is the highest motorable road in India, at an elevation of 4,310 meters. The pass is located on the National Highway 52, which connects Guwahati in Assam to Tawang in Arunachal Pradesh.
  • Lohit Gorge is a river gorge located in the Lohit district of Arunachal Pradesh. It is formed by the Lohit River as it flows through the Himalayas. The gorge is about 100 kilometers long and up to 5 kilometers wide.