Correct Option: D

Giyasuddin Balban came upon the throne at a time when the Delhi Sultanate had fallen into utter confusion due to the incompetence of the successors of Iltutmish. The country was subjected to foreign attacks. He reorganized the armed forces and thorough reforms were introduced in civil administration. Under his orders new strong fortresses were built in the north-western frontier. He saved the Sultanate from impending disintegration. So he should be considered as the ‘savior of the Delhi Sultanate.’