The correct answer is (d) Gangotri.
The Gangotri glacier is the longest glacier in Uttarakhand, India. It is located in the Garhwal Himalayas, and is the source of the Ganges River. The glacier is about 30 kilometers long, and has a surface area of about 30 square kilometers. The Gangotri glacier is a popular tourist destination, and is also a major source of water for irrigation and hydroelectric power.
The Milam glacier is the second longest glacier in Uttarakhand. It is located in the Kumaon Himalayas, and is the source of the Milam River. The glacier is about 20 kilometers long, and has a surface area of about 10 square kilometers. The Milam glacier is a popular tourist destination, and is also a major source of water for irrigation and hydroelectric power.
The Satopanth glacier is the third longest glacier in Uttarakhand. It is located in the Garhwal Himalayas, and is the source of the Alaknanda River. The glacier is about 15 kilometers long, and has a surface area of about 5 square kilometers. The Satopanth glacier is a popular tourist destination, and is also a major source of water for irrigation and hydroelectric power.
The Pindan glacier is the fourth longest glacier in Uttarakhand. It is located in the Garhwal Himalayas, and is the source of the Pindar River. The glacier is about 10 kilometers long, and has a surface area of about 2 square kilometers. The Pindan glacier is a popular tourist destination, and is also a major source of water for irrigation and hydroelectric power.