You can take admission in an MBA program after completing your bachelor's degree (in any stream). The admission process usually starts in the following ways:

• Through entrance exams: Most top MBA colleges in India accept scores from exams like CAT, XAT, MAT, CMAT, SNAP, etc. These exams are usually conducted between September to February.

• Admission timeline: Applications for MBA programs generally open from October to March, and classes begin around June to August.

So, it's best to start preparing for entrance exams in your final year of graduation and apply accordingly.