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 · Drainage System of IndiaMedium · 45s
Statement I: River Narmada forms an example of trellis drainage pattern.Statement II: Trellis drainage develops in folded mountains or where hard and soft rocks alternate.Which is correct?
TopicDrainage System of India
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.
Narmada flows through a rift valley; its drainage is not trellis but parallel. Trellis develops in regions of alternating rock bands.
Final Answer: Option D — I is incorrect, II is correct