A quick look on the website of the German Embassy in Mumbai would have answered your questions:
https://india.diplo.de/in-en/service/-/1908750
https://india.diplo.de/blob/1869928/...ining-data.pdf
One quick note: It says you need a deputation/no-objection letter of your local employer. In your case you need this form your local university where you do your bachelor.
More info can be found here:
https://www.germany-visa.org/training-internship-visa/
This is not an official site of the German embassy but gives you some additional information.