I am completed 12 computer science with 78 % and i am confused that what course will i take ? I am more intrested in computer field

In Europe/the UK, the current big areas of demand are:

HTML5
Database
Network infrastructure
Linux/LAMPS

I know in India, for instance Linux is not so big.

If I wanted to secure my future, I'd get REALLY good with HTML5 - it changed everything we thought about developing web applications instantly.