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 · Basic Ecology and EnvironmentMedium · 45s
Consider the following: 1. Eutrophication is the excessive enrichment of water bodies with nutrients. 2. It results in an algal bloom, which depletes dissolved oxygen. Which is/are correct?
TopicBasic Ecology and Environment
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.
Excessive nutrients → algal bloom → decomposition → oxygen depletion → fish kills.
Final Answer: Option C — Both 1 and 2