hi

Of course, you can go for BSc in Mathematics if you further want to pursue MCA.

Eligibility criteria for MCA : Candidates should have completed their bachelors in any stream (science, arts or commerce) and should have scored at least 50% marks and must have had Mathematics as one of the main subjects in 10+2.

For more information about MCA, please refer to this link:

https://www.careers360.com/courses/mca-master-of-computer-applications#MCA-Eligibility-Criteria

Hope this helps :)