(a)	Inner core and outer core
(b)	Warm surface water and cold deep water in an ocean
(c)	Earth's atmosphere and outer space
(d)	Southern Ocean and Indian Ocean

Correct Option: (c)

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Solution

The Karman line is the altitude where space begins. It is 100 km (about 62 miles) high. It commonly represents the border between the Earth's atmosphere and outer space.

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