Identifying Rivers Not Originating in India

The question asks us to find the river from the given options that does not start its journey within the geographical boundaries of India. Let's look at the origin points of each river listed:

• Chenab River: The Chenab River is formed by the confluence of two rivers, Chandra and Bhaga, in the Lahaul and Spiti district of Himachal Pradesh, India. So, the Chenab originates in India.
• Ravi River: The Ravi River also originates in the Kullu district of Himachal Pradesh, India, near the Rohtang Pass. Thus, the Ravi originates in India.
• Mahanadi River: The Mahanadi River originates from the Amarkantak hills of Chhattisgarh, India. Therefore, the Mahanadi originates in India.
• Brahmaputra River: The Brahmaputra River, known as Yarlung Tsangpo in Tibet, originates from the Chemayungdung Glacier located in the Himalayas near Lake Manasarovar. This region is in southwestern Tibet, which is outside the territory of India. The Brahmaputra enters India in the state of Arunachal Pradesh.

Based on their origins, the Brahmaputra River is the one among the given options that does not originate in the Indian territory.