Did you mean “What field of Engineering is best for my feature?”
It’s not a matter what you are studying, where you are studying, Whatever you can study but it is very very important HOW YOUR ARE STUDYING, just copying the matters from the textbook to your mind would not help you anyway but you can get marks by this way, Is getting marks is the only target of study? absolutely not. it is a portion of target, But getting marks is identification for you, to show how you gave respect to your field.
Finally we conclude Study anything but understand what you have studied, this will make you better future, if you unable to understand before the exams , then copy the contents to your mind to give respect to your field by getting marks, again try to understand things