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The highest layer of the atmosphere is the:

AStratosphere
BTroposphere
CMesosphere
DExosphere
Answer & Solution
Correct answer: D. Exosphere
1. Layers stack from the troposphere upward. 2. Above the thermosphere the air thins into space. 3. That highest layer is the exosphere. _Source: syllabus Geography, 'Composition and Structure of Atmosphere' (kegy207)_
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