The correct answer is D. Ulugh Khan.
Balban was a Turk who came to India in the early 13th century. He served as a slave in the court of the Delhi Sultanate, and eventually rose to become one of the most powerful men in the empire. In 1266, he was appointed as the wazir (prime minister) by Sultan Nasiruddin Mahmud. Balban proved to be a capable administrator, and he helped to restore order to the empire. He also led a number of successful military campaigns, and he expanded the territory of the Delhi Sultanate. In 1287, Balban was appointed as the sultan of Delhi. He ruled for 12 years, and he is considered to be one of the greatest rulers of the Delhi Sultanate.
The title of Ulugh Khan was conferred to Balban by Nasiruddin Mahmud in recognition of his services to the empire. The title means “great khan” or “high-ranking khan”. It is a sign of great honor, and it is only given to those who have achieved great things.
The other options are incorrect. Mewat Khan was a title given to Balban’s son, Bughra Khan. Padam Khan was a title given to Balban’s grandson, Muhammad bin Bughra Khan. Umar Khan was a title given to Balban’s great-grandson, Kaiqubad.