Who was called 'a slave of a slave' ?

Detailed Solution:

The correct answer is “Iltutmish”.

Iltutmish was called "a slave of a slave." He was a slave to Qutubuddin Aibak, who was himself a slave of Muhammad Ghori. Iltutmish eventually became the ruler of the Delhi Sultanate and is considered the real founder of the Slave Dynasty.