Explanations:The Brahmaputra River is one of the major rivers in the northeastern part of India, and it plays a significant role in the geography and hydrology of the region. The river originates in the Angsi Glacier in the Himalayas, located in the Tibet Autonomous Region of China. As it flows through Tibet, it is known by various names, including the Yarlung Tsangpo. When it enters India in the state of Arunachal Pradesh, it is called the Dihang.
The Dihang River is a major tributary of the Brahmaputra. It flows through the eastern part of Arunachal Pradesh and joins the Lohit River to form the Siang River, which is another name for the Brahmaputra in Arunachal Pradesh. The Siang then flows into Assam, where it is known as the Brahmaputra. The river continues its course through Assam and eventually joins the Ganga in Bangladesh, forming the world's largest delta, the Sundarbans.
Understanding the different names of the Brahmaputra in various regions is crucial for geographical knowledge. The river is known as the Tsangpo in Tibet, Dihang in Arunachal Pradesh, Siang in Arunachal Pradesh, and Brahmaputra in Assam. This river system is vital for the ecological and economic activities of the northeastern states of India, providing water for irrigation, transportation, and hydroelectric power generation.
It is important to note that the Ganga, Indus, and Kaveri are other major rivers in India but are not related to the Dihang River in Arunachal Pradesh. The Ganga originates in the Himalayas and flows through the northern plains of India, the Indus originates in Tibet and flows through Pakistan, and the Kaveri is located in southern India. Therefore, the correct answer is that the Brahmaputra is the river that is called the Dihang when it enters India in Arunachal Pradesh.