BBA

Yes, you have a very good chance of getting a scholarship. But it is very hard to achieve and hard work need to be put in to achieve it.

While filling exam form, you have to select exam location.

Yes, any candidate who completed his or her Bachelor's degree can appear for CAT.

In the entrance aptitude test we have questions related to basic reasoning, direction related questions, simple mathematics and verbal section where you'll be given fill up the blanks and reading comprehension. All in all your basic knowledge is tested through the entrance test.

Manav Rachna is a better option, because Manav Rachna is best private university in Delhi-NCR. Infrastructure: Very Good
Course Curriculum: Good
Placement: Average
Teachers/faculty members: Well qualified and helpful also.

In order to get admission in BBA, students must have commerce / accountancy / mathematics as one of the subjects in 12th.

Reva University is good for BBA with experienced faculty members and fees would be 70-90k p. a.

Yes, Arihant gives you an insight about the whole course curriculum for the entrance exams and I, during my college times, took the help of the guide to clear it. It is actually helpful. I am sharing you the link for Arihant where you can understand which will be the right choice to buy for your studies.
https://www.google.com/url?sa=t&source=web&rct=j&url=https://arihantbooks.com/management-entrances/guide-for-bbabbsbbm-2019&ved=2ahUKEwizqdOT8PnhAhVUjeYKHStQBPsQFjAAegQIARAB&usg=AOvVaw0be9Vay_ABIteuOknJ0uUM