Best Diploma Courses After 12th: After class 12th, most students are confused and unaware at the same time. Confused as to what to do next, and unaware as to what opportunities are available. BA, B.Com and B.Tech, are the courses that most of you might have heard from friends and relatives. But the opportunities after class 12th are not limited to them alone. There are various options for you to consider before making your final decision.