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The process by which gases poured out of the earth's interior to build the atmosphere is called:

AAccretion
BRadiation
CPhotolysis
DDegassing
Answer & Solution
Correct answer: D. Degassing
1. The early air held water vapour, nitrogen, carbon dioxide and methane. 2. This outpouring is degassing. 3. Volcanic eruptions kept adding gases. _Source: NCERT Class 11 Fundamentals of Physical Geography, Chapter 2, The Origin and Evolution of the Earth._
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