Multiple choice

Which is the top most layer of atmosphere?

  1. Troposphere

  2. Thermosphere

  3. Mesosphere

  4. None of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The topmost layer of Earth's atmosphere is the exosphere, which transitions into outer space. Since exosphere is not listed among the standard options, the correct choice is None of these.

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