Solved UPSC CDS/OTA Question
A solved UPSC CDS/OTA PYQ - decoded step-by-step.
Solve it the standard way once - then learn the shortcut.
Q · Geological Time ScaleMedium · 45s
Trilobites were abundant in which Era?
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:Trilobites were dominant marine arthropods during the Paleozoic, especially in the Cambrian and Ordovician.
Final Answer: Option C - Paleozoic Era