The correct answer is B. Jhelum river.
The Jhelum river is a major river in the Indian subcontinent. It is one of the five rivers of Punjab, and is the largest tributary of the Chenab river. The Jhelum river originates in the Pir Panjal Range in the Indian state of Jammu and Kashmir, and flows through the Pakistani provinces of Azad Kashmir and Punjab before joining the Chenab river near Trimmu. The Jhelum river is a major source of irrigation and drinking water for the people of the region. It is also a popular tourist destination, with many historical and religious sites located along its banks.
The other options are incorrect because they are not rivers that drain into Wular lake. The Ravi river is a river in India and Pakistan. It is one of the five rivers of Punjab. The Ujh river is a river in India and Pakistan. It is a tributary of the Ravi river. The Kishanganga river is a river in India and Pakistan. It is a tributary of the Jhelum river.
Wular lake is a lake in the Indian state of Jammu and Kashmir. It is the largest lake in Jammu and Kashmir, and the second largest lake in India. The lake is located in the Pir Panjal Range, and is fed by the Jhelum river and its tributaries. Wular lake is a popular tourist destination, and is home to a variety of wildlife, including migratory birds.