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 · MineralsMedium · 45s
Which of the following is the correct order of coal types in increasing carbon content?
TopicMinerals
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.
Anthracite is the highest grade, and peat the lowest.
Final Answer: Option A - Peat < Lignite < Bituminous < Anthracite