Multiple choice

In atmosphere the lowermost layer is

  1. Troposphere

  2. Exosphere

  3. Ionosphere

  4. Strato sphere
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A Correct answer
Explanation

The troposphere is the lowest layer of Earth's atmosphere, extending from the surface to about 10-15 km altitude. It contains approximately 75% of the atmosphere's mass and is where all weather phenomena occur. The stratosphere lies above it, followed by the mesosphere, thermosphere, and exosphere extending outward.

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