Hi Devesh,

Yes, you will get the branch even if your rank is below the opening rank. But your rank must not be below the closing rank. Your rank must be within opening and closing rank.

Thank you and best of luck.

Opening rank is the first rank with which a student took admission in that particular year.
Closing rank is the last rank for admission.
These vary every year.

Let's take the opening rank 109 and closing rank 400 in 2017.
Suppose your rank is 199 in 2018. Then you will get admission mostly.
Your rank is 100. Then also you'll get admission easily.
If you rank is 459. Then the chances are less.

Hope you understand this. All the best!