i am doing b.tech i want to know that i can do mba or m.tech

You are doing B tech, if you have choosen to get into technical line, why you want to change to Management line?? If you want to go further in Technical line, go for M tech, if you want to get into Management line, go for an MBA.

You can opt for both.but if u have done b.tech u are now a technical person and you should stick to that. Thus from my point of view doing m.tech would be a better choice.

If you are doing B tech the more beneficial is that you do M tech if you looking career in your emgineering field.

You can do both M.tech and MBA after completing B.Tech