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Both are having scope in future. SEE when you are really into either of the subject and you are going to put 100% then definitely you are going to get a good job in future. When you are possible nothing is impossible. Now, from above two you need to choose the one. So, study yourself well and then go for the one:
Mechanical Engineering
Mechanical engineering is a professional programme which helps students to understand the working mechanisms of heavy tools and machineries. It deals with construction, design, and manufacture of machines. Automobile Engineering
It is a branch of vehicle engineering, incorporating elements of mechanical, electrical, electronic, software and safety engineering as applied to the design, manufacture and operation of motorcycles, automobiles and trucks and their respective engineering subsystems. It will be advisable if you do your degree from a well known university and that provides prime placement opportunity, outstanding exposure and professional enhancement training. I can enlist some university for your help -
Delhi Technological University, Delhi
Lovely Professional University, Jalandhar
SASTRA University, Thanjavur
Andhra University College of Engineering, Visakhapatnam
These are the prime names offering all these assets to their students. These universities provides extensive learning programs and exposure to the students. They also provide worthy scholarships to its students depending upon the entrance test taken of the university or board result.