CBSE 12th

Yes, you are eligible. There, science field is not a barrier for you. Bachelor of Business Administration or BBA is a 3-year professional undergraduate course in Business Management, the minimum eligibility for which is class 12th from a recognized educational board with a minimum score of 50%. The course is divided into six semesters and comprises variants like BMS, BBM and BBS. It can also be done through Correspondence/ Distance mode and admission to the same is based on entrance tests carried out by different colleges and universities.
Some such entrance tests conducted by respective universities for admission into BBA course are:
IPU-CET
SET
AIMA UGAT
BBA course equips you with the right knowledge and skills in business and management and imparts knowledge of the principles which are perfect for a career in the corporate world. A degree in Business Administration solidifies your base for your future business and management career goals. Successful graduates of this course can opt for a range of jobs from sectors like finance, marketing, sales, management, government and education.
The average tuition fee charged for the course in India ranges between INR 1 lakhs to 2.5 lakhs. Some of the top institutes which provide admission to candidates into the 3-year program are as follows:
Indian Institute of Management (IIM), Indore
Christ University, Bangalore
University of Delhi
NMIMS University, Mumbai
Symbiosis International University
Guru Gobind Singh Indraprastha University, Delhi
Sikkim Manipal University

To enter the software industry, there is no hard and fast rule that you should have opted for PCM in class 12th. No, nothing like that. The only thing which you should have is your interest in learning new things. You need to be logically good. You should adapt yourselves to the changing technology quickly. Learn any object-oriented programming language. Understand the basics because that's going to be the base for any technology. Knowing a programming language will help you to become a developer. But software industry is much more than that. If you do not feel comfortable in the programming field, I have testing for you. If not that, data analyst position for you. Even if not that. You can be a database manager or a network engineer. Information security engineer. There is a whole bunch of opportunities in here. The only thing that matters is how much keen are you in learning new things. Technology is changing at an exponential rate. China is almost ready with its supercomputer. Understand and predict what is it needed. And how do we do it in more efficient manner is simple core if software industry. If you have this is in you, no matter even if you have taken commerce. You will surely succeed. God bless and good luck.