B.Sc

Yes, you can opt that course. Distinction is very good at B.Sc.

Hello,
Many government college give admission to student with atleast 45% marks so you can get admission if you apply for the admission but if you wants admission in private college then it is quite tough to get admission as minimum qualification is 50% for any private college.

IIT JAM Exam is already held on 11th feb for MSc entrance. It will be held next year now:https://www.eduncle.com/iit-jam-exam

The fees may vary from institute to institute. To give you an idea, it may range from Rs 60,000 per annum to Rs 3 Lacs.

Yes, you join directly in 2nd year in B.Sc, after completing Diploma in information technology. Check out the links below for details:
https://www.shiksha.com/science/course/b-sc-in-information-technology-lateral-entry-directorate-of-distance-education-Punjab-technical-university-Punjab-other-283877

The test for the integrated programme will be somewhere around in the month of May-June.

The job opportunities are in pharmaceuticals industry as a lab chemist or a QC analyst or production in charge.