Who compiled the Quran into a single book after the death of Prophet Muhammad (PBUH)?

A. Umar ibn al-Khattab
B. Abu Bakr al-Siddiq
C. Ali ibn Abi Talib
D. Uthman ibn Affan

Answer: Uthman ibn Affan


Additional Information: Uthman ibn Affan is credited with compiling the Quran into a single book form, standardizing its recitation.