The upper limit of the mesosphere is known as the:
ATropopause
BMesopause
CStratopause
DIonopause
Answer & Solution
Correct answer: B. Mesopause
1. Each layer ends at a boundary named for it.
2. The mesosphere's upper limit is the mesopause.
3. Above it lies the ionosphere.
_Source: NCERT Class 11 Geography, 'Composition and Structure of Atmosphere' (kegy207)_
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