🔴Answer: Pay attention to the following narration:

أَحْمَدُ بْنُ أَبِي عَبْدِ اللَّهِ فِي الْمَحَاسِنِ عَنْ أَبِيهِ عَنِ الْعَبَّاسِ بْنِ مَعْرُوفٍ عَنْ عَلِيِّ بْنِ مَهْزِيَارَ عَنِ الْحُسَيْنِ بْنِ سَعِيدٍ يَرْفَعُ الْحَدِيثَ قَالَ: سُئِلَ أَبُو عَبْدِ اللَّهِ عَنْ رَجُلٍ نَسِيَ صَلَاةً مِنَ الصَّلَوَاتِ الْخَمْسِ لَا يَدْرِي أَيَّتُهَا هِيَ قَالَ يُصَلِّي ثَلَاثَةً وَ أَرْبَعَةً وَ رَكْعَتَيْنِ فَإِنْ كَانَتِ الظُّهْرَ وَ الْعَصْرَ وَ الْعِشَاءَ كَانَ قَدْ صَلَّى وَ إِنْ كَانَتِ الْمَغْرِبَ وَ الْغَدَاةَ فَقَدْ صَلَّى

📚Al-Mahasin, p. 325

🔴Translation: A person who has forgotten one of the five daily prayers (to perform it) but does not know which prayer it was was asked of Imam Sadiq (peace be upon him). He said: 'He should perform a three-rak'ah prayer, a four-rak'ah prayer, and a two-rak'ah prayer. Then, if it was the noon, afternoon, or evening prayer, he has performed it, and if it was the morning or sunset prayer, he has also performed it.'

🔴According to the above narration and another narration with the same meaning in 📚Al-Tahdhib, Vol. 2, p. 197, a person who has forgotten one of the daily prayers but does not know which one it was must perform a two-rak'ah prayer, a three-rak'ah prayer, and a four-rak'ah prayer.