Yes, you can pursue BCA as a regular student and BSc. course from distance. As BCA and BSc both are degree courses of three years.

The University Grants Commission (UGC) of INDIA has approved a proposal to allow students to pursue two degree programmes at the same time. One of the degrees has to be in the regular mode and the other either in open and distance learning or online. A student can pursue two degrees in different streams as well as from different institutions. S/he may also opt for the same institution, provided it offers multiple mode of learning.