Is it possible to pursue B.Com (Hons) after passing 12th with Science?

Yes, you can do B.Com (H) after 12th with Science, one of my friend is also taken admission in B.Com (h) course even though his form the Science stream.

Yes, surely you can purse you B.Com honours after passing 12 with Science or even humanities. Since Science is considered to be tougher than commerce and Science students are more hard working in comparison to the commerce background so you have to apply the same technique and need to pull up your s

Yes, it is possible to pursue B.Com (Hons). After passing 12th with science. You can do Commerce degree even after doing 10+2 in another field. But you just have to work harder which I am sure you will do.