Hello Harsh
BIT Patna, BIT Deoghar, BIT Lalpur and BIT Mesra are different branches of BIT.
And a different certificate would be issued for all these BITs.
For example : BIT Lalpur doesn't offers the B.Tech course while BIT Mesra does and it is one of the most reputed deemed university.
For more information, you can visit the official website of BIT Mesra.
Hope this has answered your query.

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