Well Commerce, Science and Arts all streams are good and provide lots of opportunities to the candidate; according to me science has more scope then other streams.

Following are some good courses under science stream:

Engineering courses:
Aircraft Maintenance Engineering
B.E ( Manufacturing Processes and Automation Engineering)
B.E (Aeronautical Engineering)
B.E (Applied Marine Information Technology and Communitcation)
B.E (Bio-Medical Engineering)
B.E (Chemical Engineering)
B.E (Electronics and Communication Engineering)
B.Tech ( Aero Space Engineering)
B.Tech ( Metallurgical and Materials Engineering)
B.Tech (Automobile Engineering)
B.Tech (Bio-technology)
B.Tech (Bioinformatics)
B.Tech (Dairy Technology)
B.Tech (Electrical & Electronics Engineering)
B.E (Mechanical Engineering)
B.E (Petroleum and off-shore Engineering)
B.E. (Computer Science & Engineering)
B.E. (Marine Engineering)
B.E.(Hons) Manufacturing
B.E.(Hons) Mechanical
B.Tech (Information Technology Engineering)
B.Tech (Electronics & Telecommunications) & MBA (Telecom) Dual Degree
B.Tech (Mining Engineering)
B.Tech (Paint Tech.)
B.Tech (Instrumentation & Control Engineering)
B.Tech. Textile Technology
B.Tech.(H) in Manufacturing Science and Engineering
B.Tech.- Aerospace Engg.+M.Tech.-Avionics (Dual Degree)
BTech (Applied Mechanics)
BTech (Biological Sciences and Bio-Engineering)
BTech (Civil Engineering)
BTech ( Materials Science)
BTech (Paper Technology)
BTech (Physics)
BTech (Production Engineering)
Diploma in Advanced Computer Arts

Medicine courses:
(Bachelor of Unani Medicine and Surgery (BUMS)
B.M.R.Sc (Bachelor of Medical Record Science)
B.Sc (Nursing)
B.Sc Optometry
B.Sc. - Occupational Therapy
B.Sc. - Physiotherapy
Bachelor of Audiology & Speech Language Pathology (BASLP)
Bachelor of Dental Surgery (BDS)
Bachelor of Pharmacy
Bachelor of Physical Therapy
B.Sc. (Hons.) Medical Technology
B.Sc. (Hons.) Opthalmic Techniques
B.Sc. (Medical Laboratory Technology)
Bachelor of Physiotherapy
Bachelor of Science (Nursing)
Basic B.Sc. Nursing
BSc (Cardiac Perfusion Technology)
BSc (Health Information Administration)
BSc (Medical Imaging Technology)
BSc Nuclear Medicine Technology (Integrated BSc NMT)
Diploma in Clinical Research
M.B.B.S.