No marks are disclosed of any kind. There’s no data anywhere. The best thing you can get is just people already in IISER telling you how much they got in the test. For example, people say that around 100-110 marks in the SCB test fetches IISER Pune.
Also, it’s a science college, there’s no specific branch. You’ll be taught everything and then in the 3rd semester I think, you select your major. @Viraam_Rao