As per the latest guidelines by UGC, the students are allowed to pursue two degree programs at a time. So yeah! you can obviously do Regular MBA & Online MCA.

Now if you are doing MCA in Business Analytics, then the scope in it is much higher compared to that of the MCA course. So doing it will be just increasing you qualification. Doing MCA with MBA will be practically of no use in either ways. If you go for the MBA job role, MCA will not be required. And if you go for the MCA role then you will be paid less than a MBA graduate. So doing this two courses in parallel, will practically be not that beneficial. Instead, if you wish doing a course in Data Analytics can boost your career to further extent.

I hope this helps. Wish you a great day!