Drainage System and Rivers of Odisha

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1.
The Subarnarekha river is an example of?
2.
The Mahanadi river is an example of?
3.
The length of the Subarnarekha River is highest in which state?
4.
Which river forms a boundary between Odisha and West Bengal?
5.
Kanchi, Karkari, Dulang, Kharkai are the tribuataries of which river?