CBSE 12th

Yes, you can but I will suggest you to pursue this along with your graduation.

You just need to appear in the common entrance test for hotel management & then you are eligible for its admission process.

Yes, definitely, you can as your KIIT score is also okay and if you have not got the call in the first round, don't be ever dishearten as there will be other round of interviews too.

Yes, you can get admission in the Central University but you have to score good marks in their entrance exam. Mostly, the high weightage is given to your entrance score.

No, in PGDM, your current performance (PGDM marks) will impact more than the past performance.

After your 12th in commerce, surely you can pursue a Bachelor's degree in the hotel management like BHM (Bachelors in hotel management). Many top institutes offer Bachelors in hotel management such as Taj Group, IHM, Heritage Institute of Hotel Management, etc. You should visit the websites of the concerned institutes to know about the entrance exams and eligibility criteria.

Except for CA, you can pursue the following courses after completing 12th in commerce:
1) ICWA (Cost accounting)
2) CFA (Financial accounting)
3) CPA (Public accountant)
4) C.S (Company secretary)
5) BBM
6) BBM
7) B.COM in finance and accounts
8) BBA
9) DBM (Diploma in business management)
10) CBM (Certified bank manager).
Above mentioned career options are available for you which are in high demand.
All the best.

1. If you have already passed 12th in science. You must check the mentioned college's website and their academic section where you will get details of the courses which they provide.
2. Admission will open at the proper time. Especially from April to July (supposed).
3. You must apply for the course whether you want to study in general/elective/Hons.
4. For further details you will receives the notices.

Dear,
As per your query, you can think of the field related to commerce.
B.Com in financial management
BBA finance, international business and marketing
CA/CS
ACCA certification
Economics (Hons)
Actuarial Science (if you had maths with strong foundation)
Other fields are:
Psychology
Law
Mass communication
So choose the field according to your calibre and interest
All the best.