CBSE 12th

Yes, you can definitely pursue computer science engineering if you had PCM + economics in class 12th. If you wish to pursue a career in computer science engineering, you must apply to one of these colleges for bright future:
IIT's
PEC university of technology, Punjab
Bengal institute of technology, Karnataka
UTM, Shillong

Medical, engineering, dentistry, pharmacy, agricultural science, dairy science, biotechnology, management and many more. Decide what in which field you have interest, if you are fond of mathematics and technical studies probably engineering would suit you well. If you like medical studies, you may choose a medical related program. Similarly, if you would like to change your stream and enjoy analysing and integrating data you may switch to a management field. Almost all options are available to students with PCMB.

Medical, engineering, dentistry, pharmacy, agricultural science, dairy science, biotechnology, management and many more. Decide what in which field you have interest, if you are fond of mathematics and technical studies probably engineering would suit you well. If you like medical studies, you may choose a medical related program. Similarly, if you would like to change your stream and enjoy analysing and integrating data you may switch to a management field. Almost all options are available to students with PCMB.

Anything below 55% makes it very difficult. You can still try for Australia, and European countries like Belgium, Italy, Poland, etc.

Well, it depends on the students interest level. Engineering is supposedly the best field but see if you want to go into engineering disciplines. Other options include a Bachelors degree in a subject of your choice like physics, chemistry or mathematics. Other options are B.Arch, B.Com, BCA, B.Sc IT, BBA, Defence, commercial pilot programs etc.

You can chose B.Sc. in aviation.

According to me, if you are an arts student then go for BA and if you are a commerce student then go for B.Com. Apart from this there are lots of options like BBA, BCA and different vocational course.

Kindly mention the field you are interested in to get a precised answer.

Hi Deepesh,
That's good if you are good in all these subjects. In my point of view, you should choose computer animation course because it requires arts, drawing, painting, creative thinking and you are interested in all these things.

After class 12th, you can pursue aerospace engineering, aeronautical engineering or courses related like B.Sc in physics and then M.Sc in space technology. You can also pursue courses specifically in telecommunication or space technology or satellite communication etc. There are different courses available. You can also pursue B.Tech in mechanical engineering and then M.Tech in space propulsion systems. This course will help you in entering into space. Also B.Tech in electronics and telecommunication and then M.Tech in satellite communication will be helpful.