Which is the largest Ocean in the world?

The correct answer is Option (3) → The Pacific Ocean

The Pacific Ocean is the largest and the deepest ocean. It covers about 165 million square kilometres, roughly a third of the Earth’s surface and more than all the land put together, and holds the deepest point on Earth, in the Mariana Trench (about 11 km deep). The Atlantic is second in size, the Indian Ocean third and the Arctic the smallest.