BBA

Various Subjects of BBA are as follows:
Principles of Management
Business Mathematics and Statistics
Business Economics
Introduction to Operations Research
Financial and Management Accounting
Production and Material Management
Personnel Management and Industrial Relations
Marketing Management
Business Data Processing
Business Laws

Christ University Bangalore and Symbiosis Centre for Management Studies (SCMS) Pune are best Institute for doing BBA. You may refer to the following link for the list of top BBA colleges in India:
https://www.shiksha.com/bba/ranking/top-bba-colleges-in-india/93-2-0-0-0

Colleges are not approved by UGC, programs and university are approved by UGC.
Programs offered by INMANTEC are very much approved by UGC, also INMANTEC is approved by AICTE i.e. All India Council for Technical Education

Good evening,
I wonder why you want to go for CS and LLB at a time. Complete CS along with BBA or B.Com and then go for LLB.
Do not sail on two boats at a time.
Thanks and all the best.

Nowadays, admission in BBA degree in the majority of government and private universities is based on entrance examinations. There is no common BBA entrance examination like JEE Mains of engineering. You may target few universities and appear for their BBA entrance examinations.

I would suggest you to opt for a job and gain 1 or 2 years of experience then go for MBA.