Can i take admission for my 12th class study for science stream

The question is not clear here but if you are asking about choosing stream then go for one which you really love because even if you do well academically you won't be satisfied and happy. And you also need ideas about career options you can pursue after joining a stream for example if you join sciences then you can pursue Engineering, Doctor, Teaching, Research, scientists or developer etc. So go through sites read about them and then choose one for you also keep in mind that it may be difficult in beginning but sooner or later you will enjoy it if you love it.
So whatever you do, don't give up.

Best of luck

Dear Adity,

Can you please clarify your doubt?

You are asking for which entrance exam?