Option 1: Balban - Balban, whose real name was Baha ud-Din, was a powerful ruler of the Delhi Sultanate. However, there is no historical evidence to suggest that he declared himself as Sikandar-i-Sani.

Option 2: Kaiqubad - Kaiqubad was a sultan of the Delhi Sultanate who ruled from 1240 to 1246. However, there is no record of him declaring himself as Sikandar-i-Sani.

Option 3: Iltutmish - Iltutmish, also known as Shams-ud-din Iltutmish, was a prominent ruler of the Delhi Sultanate from 1211 to 1236. While Iltutmish accomplished many military victories and expanded the empire, there is no evidence to suggest that he declared himself as Sikandar-i-Sani.

Option 4: Alauddin Khalji - Alauddin Khalji was a powerful and successful ruler of the Delhi Sultanate who ruled from 1296 to 1316. He is known for his military campaigns and administrative reforms. Historical records indicate that Alauddin Khalji declared himself as Sikandar-i-Sani, the second Alexander, to highlight