The correct answer is (b), Balban.
Balban was a Turkic slave who became the Sultan of Delhi in 1266. He is known for his strong rule and for his policy of “blood and iron”, which was designed to keep the peace and to prevent rebellion. Balban was a successful ruler, and he is credited with restoring order and stability to the Delhi Sultanate.
The other options are incorrect.
(a) Iltutmish was the first Sultan of Delhi to be born in India. He was a successful ruler, and he is credited with expanding the Delhi Sultanate. However, he did not follow a policy of “blood and iron”.
(c) Jalaluddin Firoz Khalji was the third Sultan of Delhi from the Khalji dynasty. He was a successful ruler, and he is credited with expanding the Delhi Sultanate. However, he did not follow a policy of “blood and iron”.
(d) Firoz Shah Tughlaq was the fifth Sultan of Delhi from the Tughlaq dynasty. He was a successful ruler, and he is credited with expanding the Delhi Sultanate. However, he did not follow a policy of “blood and iron”.