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 · The Universe medium · 45s
Which radiation provides evidence for the Big Bang?
TopicThe Universe
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.
The cosmic microwave background radiation is the remnant heat from the Big Bang, filling the universe uniformly.
Final Answer: Option C - Cosmic Microwave Background Radiation