Which famous companion of the Prophet (PBUH) is known for his profound knowledge of Islamic jurisprudence and was referred to as the ‘Living Quran’?

A. Ali ibn Abi Talib
B. Abu Bakr al-Siddiq
C. Umar ibn al-Khattab
D. Abdullah ibn Mas'ud

Answer: Abdullah ibn Mas'ud


Additional Information: Abdullah ibn Mas'ud, one of the closest companions of the Prophet (PBUH), was renowned for his deep understanding of Islamic jurisprudence.