Multiple choice history the development of regional culture development of regional culture during medieval period india in 18th century rise of independent states kings and kingdoms of the early medieval period Who had given Mahmud an Investiture to rule as an independent ruler? Subuktgin Caliph of Baghdad name Qadirbillah Ottoman Turk Arab Caliph named Al-hitmatdai Reveal answer Fill a bubble to check yourself B Correct answer Explanation Mahmud of Ghazni received a robe of honor and a title from the Caliph of Baghdad, Al-Qadir Billah, which legitimized his rule as an independent sovereign.