I came across two opinions regarding the masnun surahs to be read in Eid Salah:
1. Surah ‘Ala and Surah Ghashiya
2. Surah Qaf and Surah Qamar
Are these established from reliable Ahadith?
Yes indeed. ‘Allamah Nawawi (rahimahullah) has written that Rasulullah would probably alternate between these sets of surahs on different occasions.
(Al-Minhaj, Hadith: 2025)
Both sets mentioned in your question are recorded in Sahih Muslim, Hadith: 2025 and 2056.
And Allah Ta’ala Knows best,
Answered by: Moulana Muhammad Abasoomar
Checked by: Moulana Haroon Abasoomar