The correct answer is: A. a-1, b-2, c-3, d-4
The Barakar is a tributary of the Damodar River. The Subarnarekha is a tributary of the Brahmani River. The Damodar is a tributary of the Hooghly River. The Mayurakshi is a tributary of the Bhagirathi River.
The following table shows the correct match between List I (River) and List II (Tributaries):
| List I (River) | List II (Tributaries) |
| — | — |
| Barakar | Kewta |
| Subarnarekha | Kharkai, Kanchi and Radha |
| Damodar | Tipra, Pusaro, Nunbil, Sidh |
| Mayurakshi | Konar, Ghari and Barakar |