The Indus Dolphin (Platanista minor) is one of the world's rarest aquatic mammals and is critically endangered.
While the main population of the Indus Dolphin resides in the Indus River system of Pakistan, a specific, highly isolated, and critically endangered population is found in:
The other rivers listed are either not primary habitats for this specific species or are associated with different dolphin species (like the Ganges River Dolphin in Ganga and Brahmaputra).
Therefore, the Beas River is the main river in India where the Indus Dolphin is found.
From which among the following pairs of species, a small quantity of fine quality wool is obtained in India?