Multiple choice

Which type of cloud can be rarely seen in the stratosphere?

  1. Mother of pearl

  2. Cumulus

  3. Altostratus

  4. None of these
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A Correct answer
Explanation

Nacreous or 'mother-of-pearl' clouds are rare, iridescent clouds that occasionally form in the stratosphere at high latitudes during winter. They require extremely cold temperatures (below -78°C) and are much less common than tropospheric clouds like cumulus or altostratus.

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