Other than Hindi-which language is used in Punjab?

Capital of Assam

__________is a main festival celebrated in Bihar.

 The Brahmaputra originates in :-

Which among the following rivers doesn't join Ganga from the south?

Which among the rivers are not from the Himalayan which joins Ganga?

 _____________________ is the most important river in the northern plains. 

Which is the main tributary of the Satluj?

 Ganga does not flows through

Which is the capital of Punjab?