Yes, you can do a Bachelor of Journalism and Mass Communication after your 12th science. BJMC is an undergraduate course in which the stream is not specific, and hence the applicants can come from any academic background. Your focus is in communication, media, or journalism rather than what you studied in school.
In BJMC, you are educated about mass communication, print and electronic media, journalism, public relations, and advertising, amongst others. A wide field for career avenues arises in this line of education concerning journalism, management of the media, creating contents, and publicity. You should be well in the books that make a cut in those specific institutions to qualify for pursuing media courses with this science background. It's an excellent option for students who are passionate about storytelling and communication.