The correct options are
A The Ravi is the largest of the five rivers of Punjab
D The Himalayas are the source of the river Ravi
The Ravi river is the smallest of the five major Punjab rivers, but it provides water to many districts nearby with the help of the Madhopur Headworks, built at the head of the river to divert water into canals. The glacier fields of the Himalayas are not the only source of water for perennial rivers like the Ravi. It also has a network of tributaries which feed water into the main river.