Dear candidate,

There are 3  streams in class 11 CBSE, they are:

1.Science: the study of physical and natural world

Medical - Physics, Chemistry, Biology, English, optional subject.

Non Medical - Physics, Chemistry, Maths, English, optional subject

2.Commerce: the study of trade and business

3,Arts/Humanities: the study of human society and world

For selecting any stream you need to pass the 10th CBSE exams and no special cut off is needed for any particular stream if you have passed your 10th then you will be eligible to join in any stream as your wish. For choosing your stream for 11th, start learning as much as you can about each stream there's going to be a world difference between 10th and 11th class studies so, you should know exactly what you are going to chose.

All the best.

Hope this information is helpful.