Bachelors

You can appear for M.Sc entrances and other competitive exams.

Hello Saurav,
The admission process is separately held for other state students for Anna University and its affiliated colleges.
You need to fill up the application form which will be released after the admission portal for Tamil Nadu and Tamil native candidates.
The official website is www.annauniv.edu
The admission is based on your overall marks in class 12 and aggregate in PCM. There is no separate entrance exam for admission.

Hi Ronit,
There are a lot of Diploma/certification courses which you can do simultaneously with your graduation. Please mention the field in which you are interested so that more details can be shared since there are a lot of courses which you can pursue.

Hi,
Don't worry about your scores right now. You can always score amazing in your CAT and expect a call. They have a criteria for eligibility. Try obtaining the best possible score for yourself.

You should follow your interests and the course you are comfortable studying. Career scope for both MBA or M.Sc in hotel management is more or less the same as the course objectives and syllabus overlaps. For the scope of MBA/M.Sc in hotel management, please refer to the link provided below:
https://www.shiksha.com/hospitality-travel/hotel-hospitality-management/articles/your-career-after-doing-hotel-management-blogId-4630

Diploma and degree both have their pros and cons, it depends on you for which course you are asking. For general courses, I would say UG+PG will always be a better option.