Reply to specific ayah inside prayer, for both the imam and the followers, both the reciter and the one who is listening the recitation #1 Sheikh Albani (R) said that, this rule is general. Because of this this rule include inside or outside prayer and obligatory or voluntary prayer. Sabbi'hisma rabbikal a'la (Exalt the name of your Lord, the Most High) The messenger of Allah (ﷺ) used to reply this ayah by saying this, Sub’hana rabbiyal a’la (Glory is to my Lord, the Most High) [1] The messenger of Allah (ﷺ) said that, who recite this ayah from sura Qiyaamah, Alaisa zaalika biqaadirin an iyu'hyaal mawta (Is not that [Creator] Able to give life to the dead?) He should reply this by saying this, Sub’hanaka fabalaa (Glory be to you! Yes! You are able to give life to the dead) [2]

Reference: [1] Ahmad, Abu Daud: 883, Sahih (Albani) [2] Bayhaqi, Abu Daud: 884, Sahih (Albani)