Correct Answer: Option D - All are correct
The Gandak River, also known as the Narayani River in Nepal, is an important transboundary river in the Indian subcontinent. Let's analyze each statement:
The Gandak River enters India in the state of Bihar: This is correct. The Gandak (Narayani) flows from Nepal and enters India at Valmikinagar in West Champaran district of Bihar.
In Nepal, the Gandak is referred to as the Narayani River: This is correct. The river is known as Narayani in Nepal, which is one of Nepal's major rivers. After it crosses into India, it is called the Gandak.
The Gandak River originates between Kanchenjunga and Dhaulagiri: This is correct. The Gandak is formed by the confluence of several streams that originate in the high Himalayan region between these two major mountain peaks. Its main tributaries (Kali Gandaki, Trishuli, etc.) originate in this region.