WAEC - Islamic Religious Knowledge Irk (2018 - No. 17)
The standardization of the Qur'an took place during the caliphate of
Ali b. Abi talib
Umar b. al -khattah
Uthman b. Affin
Abu Bakr b. Ahi Quhdafah
Explication
The standardization of Quran took place during the Caliphate of Uthman b. affin