MBA with marketing is a very good trade and you can get a very good job after doing this course. As you did B.tech then I think there is no any sense to do MBA in Marketing. You can do MBA in Technology, HR or IT because your B.tech will be count if you do MBA in Technology, HR and IT.
But if you already decided to do MBA in Marketing then You can do as Marketing is also a very broad stream to get success in the job.
But if you already decided to do MBA in Marketing then You can do as Marketing is also a very broad stream to get success in the job.