Right of Abode / certification of entitlement PLEASE HELP!

[Reddytwins]

Hello friends I'm new to this form. I really appreciate the help you are doing for your fellow human beings. My husband has settled status(ILR) and I'm his dependant. He got his ILR in Feb 2016.
Now my query is regarding "certificate of entitlement to right of abode". Our kid is born in Jun 2012 before we got settled status. Recently my child got his British citizenship by registration. Can you please suggest what documents we have to submit?
I want to know what option I have select in the online form "How you qualify for right of abode"
I'm really confused so your input is greatly appreciated. Thx

[secret.simon]

A CoE-RoA application is only possible if the person holds atleast two nationalities, one of which is British. So, for instance, a British-Pakistani dual citizen would get the CoE-RoA attached into the Pakistani passport.

So, which nationalities other than British does the child hold?