Which one of the following is not a superimposed river ?

Question

Accepted Answer

Option 3, Sutlej, is identified as the correct answer for the question regarding which river is not a superimposed river. To understand why Sutlej is the correct answer, let's delve into the concept of superimposed rivers and examine each option.

### Explanation:

**Superimposed Rivers:**
A superimposed river is one that maintains its original course and pattern despite changes in the underlying rock structure. These rivers cut through resistant rock layers, maintaining their path due to their established flow before the current geological formations were in place.

#### Option 3: Sutlej
- **Justification for Correctness:** The Sutlej River is not considered a superimposed river. It is one of the major rivers that flow through the Himalayas and the plains of Punjab. The Sutlej has a complex geological history, and its course has been influenced by tectonic activities and the uplift of the Himalayas. Unlike superimposed rivers, which maintain their course irrespective of geological changes, the Sutlej's path has been significantly altered by such factors, making it not fit the definition of a superimposed river.

#### Option 1: Damodar
- **Reason for Incorrectness:** The Damodar River is considered a superimposed river. It flows through the Chota Nagpur Plateau and has maintained its course despite the underlying geological structures. The river's path was established before the current topography, which is characteristic of superimposed rivers.

#### Option 2: Son
- **Reason for Incorrectness:** The Son River is also considered a superimposed river. It flows over the Vindhya and Kaimur ranges, maintaining its course through these resistant rock formations. This characteristic aligns with the definition of a superimposed river.

#### Option 4: Subarnarekha
- **Reason for Incorrectness:** The Subarnarekha River is another example of a superimposed river. It flows through the Chota Nagpur Plateau and has maintained its course over time, cutting through various geological formations, which is typical of superimposed rivers.

In conclusion, the Sutlej River does not fit the criteria of a superimposed river due to its altered course influenced by tectonic activities and geological changes, making Option 3 the correct answer.