The river Sarda or Saryu rises in the Milam glacier in the Nepal Himalayas where it is known as:

The correct option is Goriganga.

Explanation

The Sarda River (also known as Saryu) is a significant trans-boundary river in the Himalayan drainage system. It is a tributary of the Ghaghara River, which eventually flows into the Ganga.

Detailed Analysis:

• The river rises in the Milam glacier in the Nepal Himalayas.
• At its specific point of origin and in the upper reaches, it is known as the Goriganga.
• As it flows downstream, it forms the boundary between Nepal and the Kumaon region of India, where it is referred to as the Kali or Chauk.
• It eventually joins the Ghaghara River.

Analysis of Incorrect Options:

• Kaligandak Kaligandak: This river is part of the Gandak system and originates between Dhaulagiri and Mount Everest in Nepal.
• Trishulganga Trishulganga: This is a major tributary of the Gandak River in central Nepal.
• Karnali Karnali: This is the name of the Ghaghara River itself in Nepal. The Sarda is a tributary that flows into the Ghaghara (Karnali).

Key Takeaway: The Sarda River originates as the Goriganga from the Milam glacier and is subsequently known as the Kali along the Indo-Nepal border.