In congregational Salah, a person who comes late is expected to
pronounce the taslim to indicate his arrival
say subhanallah so that the Imam can note his presence
recite the iqama before joining the congregation
make takbiratul ihram and join the Imam
Correct answer is D
The person who joins the congregational prayer after the Imam has done a Rakah or more should first say the opening Takbir Takbirat Al Ihram while standing and then should move, directly to perform the act that the Imam is performing and when the Imam finishes the prayer he (the person who joined the prayer late) should complete what he has missed.