BCA

Dear Akshayaa,
Both the fields having different scope and features.You can't give tag best or not best to any of the field .here is few points for both the field for your reference so that you have idea regarding
Bsc- math : There various options available for B.Sc Mathematics graduate to pursue their higher studies. Details of best higher studies options for B.Sc Mathematics graduates are given below.
M.Sc/Ph.D: One of the best higher studies option available for the B.Sc Mathematics graduate is to do Master's Degree in Mathematics followed by Ph.D or M.Phil. Thus they can find a promising career in Research or Teaching field.
BCA :
Bachelor in computer application (BCA) is one of the popular courses among the students who want to make their career in the IT field. The duration of the course is 3 years and comprises of the subjects like database, networking, data structure, core programming languages like 'C' and 'java'.
This course provides a lot of opportunities to the students who are interested in computer field and wants to work in the IT sector as programmer or software developer.
So choose the field according to your interest and passion.
All the best

Hi Siddharth,
Bachelors in Computer application (BCA) is one of the popular options to make a career in information technology. It is an undergraduate academic degree in computer application. The duration of this program is three years. It is equivalent with B.Tech/B.E in Computer Science or Information technology. More than 1000 institutions provide BCA courses in India with an annual intake of more than 50,000 students. This program provides a sound academic base for an advanced career in computer application.
This program demonstrates sound knowledge in key areas of computer science or industrial computing. It also carries out the required analysis and synthesis involved in computer systems, information systems and computer applications.
Eligibility:
To be eligible for BCA, you should have passed 10+2 from any stream with English as passing Subject with minimum 45% marks in aggregate
Career prospects:
After the successful completion of the program, a student should be able to get entry level job in the field of Information Technology or ITES.
BCA graduates can also start their career as programmers and rise to that of senior programmers.
Software Development & Design in companies like Microsoft, Oracle, Wipro, Infosys etc.
System Administrator in big corporate companies like Citibank, HLL, P & G etc.
Training & Development in companies like NIIT, Cisco etc.
Hope it helps. Please feel free to revert.
Wish you luck.