B.Sc Eligibility

You need to have a minimum of 60% to be eligible.

Kurukshetra University offers admission to aspirants on the basis of both merit or entrance exam. In some courses, admission is offered on the basis of both, that is, a candidates score in the entrance exam as well as mark secured by them in the qualifying examination. As per my knowledge B.Sc. admissions are merit based.

Refer this link: https://www.shiksha.com/university/gauhati-university-gu-guwahati-20039/admission

First, your English language is totally incorrect in this question. And, in my knowledge 50% is applicable for B.Sc nursing in government colleges, so I don't think you can do this.

Yes, there is an entrance exam for every course so you can check eligibility criteria for B.Sc on their portal.
http://www.srmuniv.ac.in/admission-india/adm-procedure/all-about-srmjeee

Yes, B.Sc in hospitality can be pursued. But, the question is why you want to pursue it after third year B.Com.
If you are already in third year B.Com, then go for M.Com or MBA. If hospitality is something which you are fascinated about, then do some small courses in hospitality or hotel management instead of spending 3 years for B.Sc.
You already have a B.Com degree, then go ahead for a master's degree or professional courses.
Let me know if you have any further doubts. All the best.

Hello, Minimum percentage required for B.Sc Nursing is 45% of marks. That is, any candidate must secure minimum 45% of marks from the recognized University with Physics, Chemistry and Biology are the Main subjects. And, you must have English language as the Main subjects.

You just need to pass your 12th from a recognised board to take admission for BSc in interior design at Karavali Group of Colleges, Mangalore, as per the criteria.
Please check this link: https://www.shiksha.com/design/interior-design/course/b-sc-in-interior-design-karavali-group-of-colleges-mangalore-262142