Which banks are used by bitcoin exchanges in India?

[@prashant]

Are BTCxIndia & PocketBits operating without any bank?

looks like it 
but still doesn't matter, most of them partner with private banks just for making profit. 

They are using it but they have not revealed any information regarding bank ,only those who are using them can tell you.

[iram3130]

Are BTCxIndia & PocketBits operating without any bank?

looks like it 
but still doesn't matter, most of them partner with private banks just for making profit. 

Not just making profit, private banks will make you feel like a king of you give them these type of deals. A big limit on their credit with much leverages​.
To OP: thank you for making a list, it's nice to know about our exchanges.

[mattermaster]

Zebpay uses major ranked indian bank accounts. It has the ability to transfer your exchanged money into your bank account same day.
They have live excgange rates , users easily asses when to sell and when to buy.

[TigerMart]

Many new exchanges have appeared and existing exchanges changed their Banks. Hence I updated OP. Please provide relevant info in this post, if u have one.