What should the personpraying behind an imam do if he recites a verse in which there is asajdah (prostration)?

What should I do if I recite a soorah in which there is a sajdah when
I am praying behind an imam?.
Praise be to Allaah.
You should not prostrate, because following the imam is obligatory and
the prostration of recitation is Sunnah. If a person is praying behind
an imam, it is not permissible for him to prostrate, and if he
prostrates deliberately although he knows that that is not
permissible, then his prayer becomes invalid.