Q. Which is the widest continental Shelf in the world?
Answer: Siberian Shelf
Notes: Continental Shelf is the extended margin of each continent occupied by relatively shallow seas and gulfs. 
The shelves are wider where the coast lands are wide plains E.g. The Siberian shelf in the Arctic Ocean, the largest in the world, stretches to 1,500 km in width.

This question is part of 40000+ General Studies MCQ Series Course on GKToday Android app. Question Number: 77 in Oceanography - Major Oceans, Ocean Bottom Relief, Ocean Deposits in above course in App.