Geological Time Scale · UPSC CDS/OTA · Question 16 of 30

Geological Time Scale – Question 16

Step-by-step solution. Geological Time Scale for UPSC CDS/OTA.

Topic
Geological Time Scale
Subject
General Studies
Difficulty
Medium
Solve Time
45–60 sec

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Q · Geological Time ScaleMedium · 45s

Which of the following represents the correct Eon order?

TopicGeological Time Scale
Question Typemultiple choice
DifficultyMedium
Marking+1 / −0.33
Test Duration30 min

Step-by-Step Solution

The complete worked solution.

Every step explained — no skipped algebra.

Explanation:The order is: Hadean → Archean → Proterozoic → Phanerozoic.

Final Answer: Option B — Hadean → Archean → Proterozoic → Phanerozoic
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Geological Time Scale Question 16 – UPSC CDS/OTA