Hello Simranjot,

If you are going to appear in bachelor of science exams i.e. (BSC Hons. Physics, Chemistry, Mathematics) you just need to well prepare your all syllabus of class 11th and class 12th and for good rank in common entrance test do follow competitive syllabus as well, otherwise there is no issue if you had studied well during your 11th and 12th as GNDU entrance test is not that much tough.

Study thoroughly and understand all concepts from reference books, so to attempt objective type questions.

Good luck!