‘Siri’, the second city of Delhi, was built by ______.

The correct answer is Option 3- Siri

Siri, the second city of Delhi, was built by Alauddin Khilji. He built it in the early 14th century to defend his kingdom against Mongol invasions. Siri was a well-fortified city with a strong wall and several gates. It also had a number of important buildings, including the Siri Fort, the Hauz Khas reservoir, and the Jamaat Khana Mosque.

Siri was never conquered by the Mongols, and it remained the capital of the Delhi Sultanate for several decades. However, it was eventually abandoned in the 16th century, and its ruins can still be seen in Delhi today.

Sher Shah Suri, Prithviraj Chauhan, and Firuz Shah Tughlaq were all rulers of Delhi, but they did not build Siri. Sher Shah Suri built the city of Shergarh, Prithviraj Chauhan built the city of Qila Rai Pithora, and Firuz Shah Tughlaq built the city of Firozabad.