Hello Sooraj

Candidates have to generate the unique code first to proceed for the final registration.

For the final registration, you will have to login using your registration ID, unique code, password and displayed captcha code
After that, you will have to fill the qualification details
Next, you will have to make payment of AIIMS MBBS application fee
And then there will be an option for City Choice.

You can check the detailed procedure of the final registration using the link below-

https://medicine.careers360.com/articles/aiims-mbbs-application-form

Good Luck!