………….. river emerges from Mapchachungo glacier of Nepal situated at Himalayan ranges.

The correct answer is: B. Bagmati

The Bagmati River is a major river in Nepal. It originates from the Mapchachungo glacier in the Himalayas and flows south through the Kathmandu Valley before joining the Ganges River in India. The Bagmati is a sacred river for Hindus and is considered to be one of the most important rivers in Nepal.

The other options are incorrect because:

• The Gandak River originates from the Gomukh glacier in the Himalayas and flows east through Nepal and India before joining the Ganges River.
• The Kamla River originates from the Dhaulagiri Himal in the Himalayas and flows west through Nepal and India before joining the Karnali River.
• The Ghaghara River originates from the confluence of the Karnali and Sharda rivers in Nepal and flows east through Nepal and India before joining the Ganges River.