UPSC CSE Prelims
Question 19
When you travel in Himalayas, you will see the following:
- Deep gorges
- U-turn river courses
- Parallel mountain ranges
- Steep gradients causing landsliding
Which of the above can be said to be the evidences for Himalayas being young fold mountains?
View correct answer and explanation
Correct answer: D
Correct Option: D
Explanation: The young, tectonically active Himalayas have parallel folded ranges, steep gradients, incised gorges and abrupt river bends.
Statement/Item-wise Analysis:
1: Correct - Deep gorges result from rapid uplift and downward river erosion.
2: Correct - Sharp bends and U-turns can reflect uplift, structural control and antecedent drainage.
3: Correct - Parallel ridges record successive belts of folding and thrusting.
4: Correct - Steep unstable slopes cause frequent landslides in this active mountain belt.
Option-wise Analysis:
A: Incorrect - omits correct items 3, 4.
B: Incorrect - omits correct item 3.
C: Incorrect - omits correct items 1, 2.
D: Correct - includes exactly the valid statements/items and excludes the invalid ones.