The Assam Himalayas lie between which of the following rivers?

The correct answer is Teesta and Dihang rivers . Key Points The Assam Himalayas refer to the easternmost part of the Himalayan mountain range , situated between the Teesta river in the west and the Dihang river (also known as the Tsangpo-Brahmaputra ) in the east. Hence, option A is correct. This section of the mountains spans a total length of approximately 720 kilometers and covers parts of Assam , Arunachal Pradesh , and the sovereign nation of Bhutan . The Dihang river serves as the eastern boundary, where the Himalayas take a sharp southward "hairpin" bend ( syntaxial bend ) to form the Purvanchal hills. The elevation of the Assam Himalayas is generally lower than the Nepal Himalayas , but it contains significant peaks such as Namcha Barwa ( 7,756 meters ), Kula Kangri ( 7,554 meters ), and Chomo Lhari ( 7,314 meters ). This region is characterized by heavy rainfall, dense forests, and narrow longitudinal valleys known as Duars , which are crucial for tea cultivation in India . Additional Information Punjab Himalayas: This section lies between the Indus and Satluj rivers , spanning roughly 560 kilometers . It is also traditionally referred to as the Kashmir and Himachal Himalayas . Major ranges in this region include the Karakoram , Ladakh , Pir Panjal , and Zanskar ranges. Kumaon Himalayas: Located between the Satluj and Kali rivers , this portion covers about 320 kilometers in the state of Uttarakhand . It is home to several important peaks like Nanda Devi , Kamet , and Trishul , and is the source of the Ganga and Yamuna rivers . Nepal Himalayas: This is the longest section, extending for 800 kilometers between the Kali and Teesta rivers . It contains the highest peaks in the world, including Mount Everest ( 8,848.86 meters ), Kanchenjunga , Lhotse , and Makalu . Purvanchal (Eastern Hills): Beyond the Dihang gorge , the mountains extend along the eastern border of India with Myanmar . These hills include the Patkai Bum , Naga Hills , Manipur Hills , and Mizo Hills . Important Points The regional or longitudinal classification of the Himalayas based on river valleys was first proposed by the geographer Sir Sidney Burrard . The Teesta river , which originates in Sikkim , is a major tributary of the Brahmaputra and plays a vital role in the ecology of West Bengal and Bangladesh . The Kali river (also known as Mahakali or Sharda ) serves as the natural international boundary between India and Nepal . The Brahmaputra river enters India near Gelling in Arunachal Pradesh , where it is known as the Siang or Dihang , before reaching the Assam plains.