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WBCS Main Examination 2023 — Paper IV: General Studies II · Question 49 of 200

Q49
General ScienceEnvironment & Ecology
The coldest layer of the atmosphere is
  1. a.Troposphere
  2. b.Stratosphere
  3. c.Mesosphere
  4. d.Thermosphere

Answer: (C) Mesosphere

Temperature falls with height through the mesosphere to about −90 °C at the mesopause, the coldest part of the atmosphere. The thermosphere above is the hottest layer, and the troposphere and stratosphere are never that cold.