Yes duns are the longitudinal valleys that are present between himachal and shivalik subranges of Himalayas,eg dehradun ,kotlidun ,patlidun etc

The correct answer is option 'D) Duns'. The longitudinal valleys lying between the lesser Himalayas and the Shivalik range are known as duns. Let's discuss this in detail.

Duns:
- A dun is a term used for a longitudinal valley that lies between the lesser Himalayas and the Shivalik range.
- These valleys are formed due to the tectonic activities and the folding of the Earth's crust.
- Duns are characterized by their flat or gently sloping terrain and are usually fertile and agriculturally productive.
- The rivers that originate in the Himalayas flow through these duns before entering the plains.
- The duns provide important routes for transportation and communication between the mountain regions and the plains.
- Some of the major duns in India include the Dehradun Valley, Kotli Dun, Tons Valley, and Patli Dun.

Kangra Valley:
- Kangra Valley is not a correct answer choice for this question.
- It is located in the western Himalayas in the state of Himachal Pradesh, India.
- Kangra Valley is a broad, fertile valley known for its scenic beauty and agriculture.
- It is surrounded by the Dhauladhar Range on one side and the Shivalik Range on the other.
- The Beas River flows through the Kangra Valley, providing water for irrigation and hydroelectric power generation.

Patkai Bum:
- Patkai Bum is not a correct answer choice for this question.
- It is a mountain range located in the northeastern part of India, near the India-Myanmar border.
- The range is part of the larger Patkai-Mizo range and is known for its dense forests and diverse wildlife.
- Patkai Bum is not related to the longitudinal valleys between the lesser Himalayas and the Shivaliks.

Passes:
- Passes are not a correct answer choice for this question.
- Passes refer to the gaps or openings in mountain ranges that provide routes for transportation and movement across the mountains.
- While passes are important in the Himalayas, they are not specifically related to the longitudinal valleys between the lesser Himalayas and the Shivaliks.

In conclusion, the correct answer is option 'D) Duns' as these are the longitudinal valleys lying between the lesser Himalayas and the Shivaliks.