Is it correct to say "Ajal wa A'la wa A'atham" (Most Glorious, Most High, Most Magnificent) or just "Allahu Akbar" (Allah is the Greatest) when the Mu'adhdhin says "Allahu Akbar"?

"Whoever hears the adhan should repeat what the muezzin says, based on the Prophet's (peace be upon him) saying: 'When you hear the call (adhan), then say as the muezzin says,' agreed upon. And when the muezzin says 'Allahu Akbar,' the listener should say 'Allahu Akbar,' and not replace it with 'Allahu A'la' (Allah is Higher) or 'Allahu Ajall' (Allah is More Glorious). Repeating the adhan after the muezzin is a Sunnah according to the majority of scholars."