hi. i have completed my B.Tech(aero) with 65%. and i am interested in design so can i opt m.tech in cad/cam plz suggest career options

you can do Mtech only in your relevant field whatever in your b tech degree

If you're creative, you can also consider going for Design and Animation. However, you must first check if you're suited for Animation. Animation is an art form and a very demanding career. It has ample opportunities for the creatively talented people. Typically you should have good sketching skill