Deepest known part of the world’s oceans, and the deepest location on the surface of the Earth’s crust

What is the deepest known part of the world's oceans, and the deepest location on the surface of the Earth's crust?

1. The Kate Gully

2. The Josephine Ditch

3. The Mariana Trench

4. The Emma Furrow

Correct Option: Option C,

The Mariana Trench

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Marianas Trench is located is in the western Pacific Ocean, to the east of the Mariana Islands. It is about 2,550 kilometres (1,580 mi) long and has a mean width of 69 kilometres (43 miles). It reaches a maximum depth of about 11,034 metres (36,200 ft) at the Challenger Deep, a small slot-shaped valley in its floor, at the southern end.