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Start by naming your part in one sentence that someone could check. 'I designed the database and wrote the booking logic. Two teammates built the mobile screens and one handled testing and the report.' That is better than 'I was involved in all parts', which interviewers hear as 'I am not sure what I did'. It is also better than 'I built most of it', which invites a test.
If the work was genuinely shared, describe how. 'We paired on the backend for the first month, then I took over the payment part.' Shared work is normal. What matters is that you can say where your hands were.
Know the whole project anyway. Interviewers often ask about how the parts connect: how the screens call your code, what happens when the network fails, how the data gets from one place to another. You do not need to know every line of your teammates' work, but you should be able to explain the whole thing at the level of a diagram. If you cannot, sit with a teammate for an hour before your interviews and ask them to walk you through their part.
When a question lands on a part you did not build, say so and still be useful. 'That was my teammate's part, so I can tell you what it does but not every detail of how. As I understand it, it works like this.' Interviewers respect this. Guessing confidently about someone else's code and getting it wrong is far worse.
Talk about the team as well as the work, because many interviewers will ask. Choose something you did that helped the group: splitting tasks when the deadline moved, setting up a shared folder that ended the version confusion, or taking over a part when someone fell ill. Avoid stories that mainly show a teammate in a bad light. Even if they are true, the interviewer is imagining you on their team.
One practical step: agree as a team how each of you will describe the project. If four students from one project interview with the same company and each claims the same module, it is noticed. A ten-minute conversation before placement season, in which each person says 'this is what I will say I did', avoids that, and it usually makes every answer clearer.