Hey,
Bachelor of Science in Information Technology(IT) is a three year undergraduate course. It deals with storing,processing,securing and managing information.
The minimum eligibility criteria is to pass 12th from a recognised board in Science stream with Physics,Chemistry and Mathematics as the main subject with 50 percent marks in aggregate.
Admission is generally through Institute specefic entrance tests like IISER,GSAT etcetera.
Hope this helps.
Good luck.