You should look on the test centre website or ask them what they need well in advance.
I think passports are all containing photos and signed from what I see globally though not sure of India. If you don’t get a good answer and don’t have one I’d that combined take credit cards/bank cards as well and maybe contracts you’ve signed if it comes down to it and you don’t have a proper answer.
This is not the same thing but I see that exam fraud in India is highly prevalent, so you should expect pretty strict verification of your identity:
