Which one of the following statements about the atmosphere is correct?

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Question

Which one of the following statements about the atmosphere is correct?

Options:

A . The atmosphere has no definite upper limits but gradually thins until it becomes imperceptible.

B . The atmosphere has definite upper limits but gradually thins until it becomes imperceptible.

C . The atmosphere has no definite upper limits but gradually thickens until it becomes imperceptible.

D . The atmosphere has definite upper limits but gradually thickens until it becomes imperceptible.

Answer: Option A
Answer: (a)
Our atmosphere has five layers- Troposphere, Stratosphere, Mesosphere, Thermosphere and Exosphere. The exosphere is the outermost layer of the atmosphere showing altitude about from 700 km to 10000 km above sea level.
This layer gradually and gradually merges in outer space having no atmosphere.

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