Solved UPSC CDS/OTA Question
A solved UPSC CDS/OTA PYQ — decoded step-by-step.
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Q · VolcanoMedium · 45s
Which one of the following is not a type of pyroclastic material?
TopicVolcano
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:
Basalt is an extrusive igneous rock, not pyroclastic debris.
Final Answer: Option D — Basalt