which career and degree is best for the one who like to research in different fields and gain knowledge in various subjects?
If youre a Good Student, by best subjects refer to something like Physics or Chemistry as well as some part of Biology and Mathematics, you might go for something like Material Science. MSE is a very critical subject and has bits and pieces of each and every domain be it Sustainability, Material Engineering, Physics and Chemistry as well as nowadays Informatics. There are many other similar interdisciplinary courses like Nanotechnology, Avionics & Aerospace, Mechatronics, EECS, Biomedical Technology and many other branches.
If youre not a Science Student, you might pursue a MBA after Graduation and hence a Career in the Management Sector which ranges from domain to domain.
If youre interest lies in every domain, you may even pursue Government Services like UPSC CSE, State PCS, SSC CGL, Railways RRB, SBI PO, RBI Grade B and Other Examinations.