Most popular courses after 12th class but I think what should you have to do it will decided by you because you know what's your capacity and what can you do, where you can get success.
It is only you that can answer this. You can try to have a moment of reflection. What makes you good at something? You can start from there. Even if we suggest a particular major to you, it will not work for you. Have time what do you want to be in the future.