Which of the following is the coldest region of atmosphere ?
A
Thermosphere
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B
Mesosphere
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C
Troposphere
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D
Stratosphere
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Solution
The correct option is D Mesosphere
The coldest temperatures in Earth's atmosphere, about −90oC(−130F), are found near the top of this layer. The boundary between the mesosphere and the thermosphere above it is called the mesopause.
At the bottom of the mesosphere is the stratopause, the boundary between the mesosphere and the stratosphere below.