Consider the following rivers:

1. Barak
2. Lohit
3. Subansiri

Which of the above flows/flows through Arunachal Pradesh?

1. 1 only
2. 2 and 3 only
3. 1 and 3 only
4. 1, 2 and 3

Explanation

Barak is incorrect

• The Barak basin covers parts of India, Bangladesh, and Myanmar. In India, the basin spreads over Meghalaya, Manipur, Mizoram, Assam, Tripura, and Nagaland, which is nearly 1.38% of the country’s total geographical area. The Barail range separates the Barak basin from the Brahmaputra basin.
• The Barak River rises from the Manipur hills. It flows then along the Nagaland-Manipur border and enters Assam. It further enters Bangladesh, where it is known as Surma and Kushiyara.
• Later, it is called the Meghna before receiving the combined flow of the Ganga (Padma in Bangladesh) and the Brahmaputra (Jamuna in Bangladesh).
• Right bank tributaries: Jiri, Chiri, Modhura, Jatinga, Harang, Kalain, and Gumra.
• Left bank tributaries: Dhaleswari, Singla, Longai, Sonai, and Katakhal.

Lohit is correct

• It originates in the Eastern Himalayas in Tibet, where it is known as the Zayu River.
• It enters India through Arunachal Pradesh, flows southward through the Lohit district, and merges with the Dibang River before joining the Brahmaputra River near Sadiya, Assam.

Subansiri is correct

• Subansiri (or Gold River) is the largest tributary of the Brahmaputra River.
• It is an antecedent river that rises in the mountains of Tibet.
• It enters India near the town of Taksing (Arunachal Pradesh) and flows east and southeast through Miri Hills, then south to the Assam Valley at Dulangmukh in Dhemaji district, where it joins the Brahmaputra River at Jamurighat in Lakhimpur district.

Answer: (b) 2 and 3 only; Difficulty Level: Hard