1. Download the .apk file from the link give below this article.
2. Open the file on your phone.
3. Hit the install button and let the app get installed on your phone.
5. Select SuperSU in first column.
6. Now, you could see there are two option down Aragorn and Gandalf.
7. In some phone Aragorn will work and in some Gandalf. Just click anyone and see which one works on your phone.
8. After getting the success message it would say reboot your device. So switch off your phone.
9. After it gets switched off switch it on again.
10. You would see Android updating after the boot animation on your phone.
11. After it gets started you would see SuperSU in your app drawer.
Congratulations you have successfully rooted your android device.
Disclaimer: I am not responsible for any bricked devices. Perform this on your own risk. But the probability of successful root is 99.9% it only gets bricked due to following wrong procedure.
Link: https://www.mediafire.com/?quh3a4rz4jy3bqg