In appreciation of the achievements of _____________, the Khalifa of Baghdad bestowed administrative powers on him.
A. Qutub ud din Aibak
B. Razia Begum
C. Iltutmish
D. Allaudin Khilji

Hint: The prestigious title of Sultan-i-Azam meant that the receiver was only viewed as a representation of the Khalifa. The caliph is the leader of the ummah, which is the Muslim community globally. This came out of a succession crisis after the death of the Prophet in 632 CE.

Complete answer: Let us go through the options-
Option A. He was a slave (sold into the trade as a child) and the general of Ghori. He is most famously known for having the Qutub Minar in Delhi be constructed. He was succeeded by Aram Shah. Hence, this cannot be our option.
Option B. She was the daughter of Iltutmish and is the first female ruler in the subcontinent for four years. She faced a lot of criticism from the nobles and was deposed. Her attempts to reclaim power were unsuccessful as her half-brother defeated her, and she passed away post that. This is not the correct option.
Option C. He was the Mamluk (Slave) dynasty’s third emperor, that previously ruled over the Ghurid territories and essentially established the Delhi Sultanate by being the first Muslim sovereign monarch.
Option D: His birth name was Ali Gurshasp and was the most prominent leader of his dynasty. He often followed communal tactics. His conquests caused the demise of various Indian dynasties like Gohilas and Parmars. This answer is incorrect.
Therefore, option C is correct.

Note: He displayed prowess in defending his kingdom against Mongol invasions, showing his ability to have well-established administrative machinery, leading him to get powers in the same category later on.