Hello, integrated MSC have their curriculum designed such that the students can  have both undergraduate and postgraduate syllabus accommodate simultaneously. It is not like you will be studying BSC in the first 3 years and MSC further. So if you quit around 3 years you will not be provided any certificate. You can use this link to know about the courses using this link https://vit.ac.in/all-courses/pg . Also your graduation certificate will specify only MSC degree.

Hope this helps.