House of Wisdom (Bayt-ul-Hikamah) was established by_____________?

A. Al’Mansoor
B. Al’Ma’mun
C. Harun Rasheed
D. Abdul Malik

The House of Wisdom refers either to a major Abbasid public academy and intellectual center in Baghdad or to a large private library belonging to the Abbasid Caliphs during the Islamic Golden Age.