The correct answer is: Bara Shigri.
Bara Shigri is the largest glacier in Himachal Pradesh, India. It is located in the Pir Panjal Range of the Himalayas, in the Chamba district. The glacier is about 50 kilometers long and has a surface area of about 30 square kilometers. It is a source of water for the Chenab River.
Bhadal is a glacier located in the Dhauladhar Range of the Himalayas, in the Kangra district. The glacier is about 20 kilometers long and has a surface area of about 10 square kilometers. It is a source of water for the Beas River.
Bhaga is a river located in the Kangra district. The river is about 100 kilometers long and is a tributary of the Chenab River. The river is a source of water for irrigation and hydroelectric power.
Chandra is a river located in the Lahaul and Spiti district. The river is about 200 kilometers long and is a tributary of the Indus River. The river is a source of water for irrigation and hydroelectric power.
Bara Shigri is the largest glacier in Himachal Pradesh because it is the longest and has the largest surface area. Bhadal, Bhaga, and Chandra are all smaller glaciers.