Match List I with List II and select the correct answer using the code given below the Lists :
| List I (Drainage Pattern of River) |
List II (Feature) |
|---|---|
| A. Insequent | 1. Whose direction of flow is controlled by the rock structure |
| B. Consequent | 2. No apparent reason why it follows the path it takes |
| C. Subsequent | 3. Flow in the same direction as the consequent stream but at a lower level |
| D. Resequent | 4. Whose course is determined by the original slope of the land |
A-2, B-1, C-4, D-3
A-2, B-4, C-1, D-3
A-3, B-4, C-1, D-2
A-3, B-1, C-4, D-2
Answer is Wrong!
Answer is Right!
This question was previously asked in
UPSC CDS-2 – 2022
A. Insequent: 2. Whose direction of flow is controlled by the rock structure – This is incorrect. Insequent streams follow no discernible pattern and are not controlled by underlying rock structure; they often develop on newly exposed, uniform surfaces or areas of thick regolith. Their path has “no apparent reason.”
B. Consequent: 4. Whose course is determined by the original slope of the land – Correct. Consequent streams flow directly down the steepest slope of the land.
C. Subsequent: 1. Whose direction of flow is controlled by the rock structure – Correct. Subsequent streams develop along belts of weaker rock resistance, often parallel to the strike of folded rock layers or along fault lines. They adjust their course to the underlying geological structure.
D. Resequent: 3. Flow in the same direction as the consequent stream but at a lower level – Correct. Resequent streams are tributaries that flow in the same general direction as the original consequent streams but form later, often on a lower erosion level.
Let’s re-evaluate the match for Insequent based on the options provided. Option 2 “No apparent reason why it follows the path it takes” fits Insequent better than any other pattern. Option 1 “Whose direction of flow is controlled by the rock structure” fits Subsequent. Option 3 “Flow in the same direction as the consequent stream but at a lower level” fits Resequent. Option 4 “Whose course is determined by the original slope of the land” fits Consequent.
Thus, A-2, B-4, C-1, D-3 is the correct matching.