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Q. Which among the following are deep valleys that are narrow and steep-sided in the ocean bottoms?
Answer: Submarine Canyon
Notes: Submarine Canyons are deep valleys that are narrow and steep-sided. They are found cutting into the continental slopes and shelves of the oceans. 
The Hudson canyon is world’s best known submarine canyon.

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This question is part of 40000+ General Studies MCQ Series Course on GKToday Android app.

Question Number: 91 in Oceanography - Major Oceans, Ocean Bottom Relief, Ocean Deposits in above course in App.