Hello Saiteja

If you got your result but still your rank is not showing in it then their may be following reason such as:

You are not eligible for the examination.

Application Fee payments is not processed.

System error by the examination committee or department.

The main reason is that may be you are not qualified in entrance examination for admission in the colleges. 

In these cases your rank is not provided in your result. 

Comment if you have any queries..

Good luck..