The correct answer is: A. a-2, b-1, c-3, d-4.
The Beas is a tributary of the Indus River. It originates in the Himalayas in the Indian state of Himachal Pradesh. The Baspa is a tributary of the Beas River. It originates in the Himalayas in the Indian state of Uttarakhand. The Chenab is a tributary of the Indus River. It originates in the Himalayas in the Indian state of Jammu and Kashmir. The Asni is a tributary of the Chenab River. It originates in the Himalayas in the Indian state of Himachal Pradesh. The Yamuna is a tributary of the Ganges River. It originates in the Himalayas in the Indian state of Uttarakhand. The Parbati is a tributary of the Yamuna River. It originates in the Himalayas in the Indian state of Himachal Pradesh. The Sutlej is a tributary of the Indus River. It originates in the Himalayas in the Tibetan Autonomous Region of China. The Bhaga is a tributary of the Sutlej River. It originates in the Himalayas in the Indian state of Himachal Pradesh.
Here is a table showing the correct match between List I and List II:
| List I (River) | List II (Tributary) |
| — | — |
| Beas | Baspa |
| Chenab | Asni |
| Yamuna | Parbati |
| Sutlej | Bhaga |