With reference to ancient India (600-322 BC), consider the following pairs :
| Territorial region | River flowing in the region |
| I. Asmaka | Godavari |
| II. Kamboja | Vipas |
| III. Avanti |
Mahanadi |
| IV. Kosala | Sarayu |
How many of the pairs given above are correctly matched?
1
Only one
2
Only two
3
Only three
4
All the four