​The Siberian Shelf, one of the coastal shelves of the Arctic Ocean, is the largest continental shelf on Earth. How many kilometres does it extend offshore?​

Correct option is D

The correct answer is (D) 1500km.

• The Siberian Shelf is part of Russia's continental shelf and is relatively shallow, with an average depth of 100 meters. 
• It includes several islands, including Wrangel Island, Novaya Zemlya, and the New Siberian Islands. 
• The Siberian Shelf in the Arctic Ocean extends 1,500 kilometers (930 miles) offshore from the coast of Siberia. It's the largest continental shelf on Earth.