sir can I do BE in regular and BCA in distance education at the same time
Yes you can do BE as a regular course and BCA as correspondence simultaneously. However, both are different fields, if you are core branch student. If you are Interested in Programming then you can pursue your BCA otherwise do your BE seriously.
Although it seems manageable now, with time you will feel the difficulty to manage both especially as they are very different.
It's better to excel in one instead of being average in both.